CVE-2026-75831

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.

CVSS 4.0

5.1CVSS: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 3.1

7.6CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-08-18

Modified

2026-10-22

Record from

the NVD, synced 2026-10-23

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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