CVE-2026-75831

Grav before 2.0.15 Stored XSS via audio/video source URL

HIGH
7.6
CVSS Score
Published: August 18, 2026 at 11:19 AM UTC
Updated: October 22, 2026 at 10:10 PM UTC
1 product affected across 1 vendorGrav

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Severity
HIGH7.6
Exploit prediction
EPSS 0.4%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

90%
0 ≤ v < 2.0.150
Vendor states this is fixed in 2.0.15 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.6HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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