GHSA-rcqw-6466-3mv7

Suggest an improvement
Source
https://github.com/advisories/GHSA-rcqw-6466-3mv7
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-rcqw-6466-3mv7/GHSA-rcqw-6466-3mv7.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-rcqw-6466-3mv7
Aliases
Published
2026-02-20T21:15:06Z
Modified
2026-02-24T16:34:57.675522Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
Summary
AVideo has Stored Cross-Site Scripting via Markdown Comment Injection
Details

Vulnerability Type

Stored Cross-Site Scripting (XSS) — CWE-79.

Affected Product/Versions

AVideo 18.0.

Root Cause Summary

AVideo allows Markdown in video comments and uses Parsedown (v1.7.4) without Safe Mode enabled. Markdown links are not sufficiently sanitized, allowing javascript: URIs to be rendered as clickable links.

Impact Summary

An authenticated low-privilege attacker can post a malicious comment that injects persistent JavaScript. When another user clicks the link, the attacker can perform actions such as session hijacking, privilege escalation (including admin takeover), and data exfiltration.

Resolution/Fix

The issue was confirmed and fixed in the master branch. An official release will be published soon.

Workarounds

Until the release is available, validate and block unsafe URI schemes (e.g., javascript:) before rendering Markdown, and enable Parsedown Safe Mode.

Credits/Acknowledgement

Reported by Arkadiusz Marta (https://github.com/arkmarta/).

Database specific 
{
    "nvd_published_at": "2026-02-24T15:21:38Z",
    "github_reviewed_at": "2026-02-20T21:15:06Z",
    "github_reviewed": true,
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-79"
    ]
}
References

Affected packages

Packagist / wwbn/avideo

Package

Name
wwbn/avideo
Purl
pkg:composer/wwbn/avideo

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
21.0

Affected versions

10.*
10.4
10.8
Other
11
11.*
11.1
11.1.1
11.5
11.6
12.*
12.4
14.*
14.3
14.3.1
14.4
18.*
18.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-rcqw-6466-3mv7/GHSA-rcqw-6466-3mv7.json"