CVE-2022-0950: Showdoc/showdoc Cross-Site Scripting Vulnerability

Q: What is CVE-2022-0950?

CVE-2022-0950 is a security vulnerability in Showdoc/showdoc involving Cross-site Scripting in ShowDoc under CWE-434: Unrestricted Upload of File with Dangerous Type.

Q: Which Showdoc/showdoc versions are affected?

Affected versions include releases prior to 2.10.4 across affected packages: showdoc/showdoc.

Q: What version fixes CVE-2022-0950?

Upgrading to 2.10.4 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is showdoc/showdoc affected?

Yes, showdoc/showdoc is affected in releases prior to 2.10.4. Upgrade your dependency to 2.10.4 or later.

Q: What is the CVSS score of CVE-2022-0950?

CVE-2022-0950 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Q: What CWE is associated with CVE-2022-0950?

CVE-2022-0950 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).

Q: How can I check Packagist dependencies for CVE-2022-0950?

Run the dependency tree command: 'inspect dependencies for showdoc/showdoc'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

MODERATE

Advisory Identifier: GHSA-v94v-pxqp-5qgj

CVSS 5.4

CWE-434 CWE-79

Published 2022-03-16

Advisory Summary

CVE-2022-0950 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Showdoc/showdoc libraries in the Packagist ecosystem. The issue involves cross-site scripting in showdoc. Remediation is available by upgrading affected packages to version 2.10.4.

CVE-2022-0950 at a Glance

CVE Identifier CVE-2022-0950

GHSA Identifier GHSA-v94v-pxqp-5qgj

Severity MODERATE

CVSS v3.1 Base Score 5.4

CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type

Affected Product Showdoc/showdoc

Package Ecosystem Packagist

Published Date 2022-03-16

Last Updated 2022-03-28

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required Low (PR:L)

User Interaction Required (UI:R)

Scope Changed (S:C)

Confidentiality Low (C:L)

Integrity Low (I:L)

Availability None (A:N)

How to Fix CVE-2022-0950

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.

showdoc/showdoc fixed: 2.10.4

Upgrade showdoc/showdoc to 2.10.4

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 showdoc/showdoc

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-0950, inspect your project dependencies for Showdoc/showdoc:

inspect dependencies for showdoc/showdoc

Analyze 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 2.10.4), 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

The upload feature of ShowDoc prior to version 2.10.4 allows files with the extension `.*html`, which leads to stored cross-site scripting.

CVE-2022-0950 Affected Showdoc/showdoc Versions

1 component(s)

Fixed Versions:

2.10.4

Product / Package	Ecosystem	Affected Versions	Fixed Version
showdoc/showdoc	Packagist	< 2.10.4	2.10.4

References

NVD — CVE-2022-0950 NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-0950

Security Fix Commit FIX COMMIT

https://github.com/star7th/showdoc/commit/237ac6d43bf3728bf3587c486a23b4a48ea7acb3

Showdoc/showdoc Source Repository REPOSITORY

https://github.com/star7th/showdoc

huntr.dev/bounties/acc23996-b... WEB

https://huntr.dev/bounties/acc23996-bd57-448f-9eb4-05a8a046c2dc

Frequently Asked Questions

What is CVE-2022-0950?

CVE-2022-0950 is a security vulnerability in Showdoc/showdoc involving Cross-site Scripting in ShowDoc under CWE-434: Unrestricted Upload of File with Dangerous Type.

Which Showdoc/showdoc versions are affected?

Affected versions include releases prior to 2.10.4 across affected packages: showdoc/showdoc.

What version fixes CVE-2022-0950?

Upgrading to 2.10.4 (or the latest patched release for your respective branch) resolves the vulnerability.

Is showdoc/showdoc affected?

Yes, showdoc/showdoc is affected in releases prior to 2.10.4. Upgrade your dependency to 2.10.4 or later.

What is the CVSS score of CVE-2022-0950?

CVE-2022-0950 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

What CWE is associated with CVE-2022-0950?

CVE-2022-0950 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).

How can I check Packagist dependencies for CVE-2022-0950?

Run the dependency tree command: 'inspect dependencies for showdoc/showdoc'. 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

View Raw JSON

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-v94v-pxqp-5qgj",
  "modified" : "2022-03-28T19:27:08Z",
  "published" : "2022-03-16T00:00:48Z",
  "aliases" : [ "CVE-2022-0950" ],
  "summary" : "Cross-site Scripting in ShowDoc",
  "details" : "The upload feature of ShowDoc prior to version 2.10.4 allows files with the extension `.*html`, which leads to stored cross-site scripting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "showdoc/showdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.10.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-0950"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/star7th/showdoc/commit/237ac6d43bf3728bf3587c486a23b4a48ea7acb3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/star7th/showdoc"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/acc23996-bd57-448f-9eb4-05a8a046c2dc"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434", "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-28T19:27:08Z",
    "nvd_published_at" : "2022-03-15T09:15:00Z"
  }
}

CVSS V3

5.4 MODERATE