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TI-2026-53077 Aliases CVE-2026-75831GHSA-6qw9-4vv5-jr97

Grav before 2.0.15 Stored XSS via audio/video source URL

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0035 28th percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.0.15getgrav/grav (Packagist): 2.0.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getgravgravbefore 2.0.152.0.15Patch availableCNA
—getgrav/grav (Packagist)before 2.0.152.0.15Patch availableGHSA-6qw9-4vv5-jr97
  • grav Vendorgetgrav Affected before 2.0.15 Fixed in 2.0.15 Patch available CNA
  • getgrav/grav (Packagist) Vendor— Affected before 2.0.15 Fixed in 2.0.15 Patch available GHSA-6qw9-4vv5-jr97

Remediation

  • Fix · CNA grav (getgrav) Fixed in 2.0.15
  • Fix · GHSA-6qw9-4vv5-jr97 getgrav/grav (Packagist) Fixed in 2.0.15 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    getgrav grav 2.0.15

    4 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-53074 Grav before 2.0.15 Stored XSS via detectXss() Quote BypassPriority HIGH 75
    • TI-2026-53073 Grav before 2.0.15 Arbitrary File Write via error_logPriority HIGH 75
    • TI-2026-52624 Grav before 2.0.15 Path Traversal via plugin-asset-map.phpPriority LOW 36
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-75831
  2. 2026-10-03 Alias added: GHSA-6qw9-4vv5-jr97

References

Patch 1

Advisory 2

Other 1

  • TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
  • TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
  • TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
  • TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3
See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences