CVE-2025-0520: Showdoc/showdoc ShowDoc Unrestricted File Upload Vulnerability Vulnerability
CRITICALCVE-2025-0520 is a CRITICAL showdoc unrestricted file upload vulnerability vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Showdoc/showdoc libraries in the Packagist ecosystem. The issue involves showdoc unrestricted file upload vulnerability. Remediation is available by upgrading affected packages to version 2.8.7.
CVE-2025-0520 at a Glance
How to Fix CVE-2025-0520
To remediate this vulnerability, upgrade all affected Showdoc/showdoc dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade showdoc/showdoc to 2.8.7Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for showdoc/showdocHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-0520, inspect your project dependencies for Showdoc/showdoc:
inspect dependencies for showdoc/showdocAnalyze the terminal output to locate any version of Showdoc/showdoc in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.7), 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Showdoc/showdoc, 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
CVE-2025-0520 Affected Showdoc/showdoc Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
showdoc/showdoc
|
Packagist |
< 2.8.7
|
2.8.7
|
References
Frequently Asked Questions
What is CVE-2025-0520?
Which Showdoc/showdoc versions are affected?
What version fixes CVE-2025-0520?
Is showdoc/showdoc affected?
What CWE is associated with CVE-2025-0520?
How can I check Packagist dependencies for CVE-2025-0520?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-6jmr-r7p6-f5wr",
"modified" : "2025-11-05T19:58:02Z",
"published" : "2025-04-29T21:31:55Z",
"aliases" : [ "CVE-2025-0520" ],
"summary" : "ShowDoc unrestricted file upload vulnerability",
"details" : "An unrestricted file upload vulnerability in ShowDoc caused by improper validation of file extension allows execution of arbitrary PHP, leading to remote code execution. This issue affects ShowDoc: before 2.8.7.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "showdoc/showdoc"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.8.7"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-0520"
}, {
"type" : "WEB",
"url" : "https://github.com/star7th/showdoc/pull/1059"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/star7th/showdoc"
}, {
"type" : "WEB",
"url" : "https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585"
}, {
"type" : "WEB",
"url" : "https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585"
}, {
"type" : "WEB",
"url" : "https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-434" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2025-04-30T17:31:58Z",
"nvd_published_at" : "2025-04-29T20:15:25Z"
}
}