High severity · published Aug 18, 2026
CVE-2026-75831
Grav before 2.0.15 Stored XSS via audio/video source URL
7.6
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 2.0.15 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75831
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75831
vendor-advisory
https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97
patch
https://github.com/getgrav/grav/commit/aba291a59cab29ddce491175791888d8d0b65e20
third-party-advisory
https://www.vulncheck.com/advisories/grav-before-stored-xss-via-audio-video-source-url
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