Vulnerability · Published Aug 18, 2026 · Assigned by VulnCheck

CVE-2026-75831Grav before 2.0.15 Stored XSS via audio/video source URL

High 7.6

In plain English

A high-severity cross-site scripting in grav from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)0.4%top 71.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that executes in viewers' sessions.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	getgrav/grav	2.0.15	GHSA-6qw9-4vv5-jr97

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	0 – before 2.0.15

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

References

GitHub Security Advisory (GHSA-6qw9-4vv5-jr97) vendor-advisory
Patch Commit patch
VulnCheck Advisory: Grav before 2.0.15 Stored XSS via audio/video source URL third-party-advisory