What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-18 · updated 2026-10-22
• Weakness: CWE-79

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 products

• getgrav grav: before 2.0.15 — fixed in 2.0.15

How to fix

Upgrade to a fixed version: getgrav grav 2.0.15. Check the vendor advisory for mitigations.

References

• https://github.com/getgrav/grav/commit/aba291a59cab29ddce491175791888d8d0b65e20
• https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97
• https://www.vulncheck.com/advisories/grav-before-stored-xss-via-audio-video-source-url
• https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97

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