TI-2026-71138 Aliases CVE-2026-109322 GHSA-44rc-569f-hxfg

Stored XSS in Grav Guestbook via AJAX pagination and admin views

LOW 23CWE-79Published 2026-10-12 · Updated 2026-10-15

Key facts

Attack vector: Network
Privileges required: None
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. Impact type from CWE-79.

Summary

The Grav Guestbook plugin before 0.5.2 contains a stored cross-site scripting flaw in its AJAX Load more and Admin Load all handlers, which insert stored author and message fields into the DOM as unescaped HTML via jQuery (CWE-79). An unauthenticated visitor can submit markup that runs in other visitors' browsers and, in versions 0.5.0 and 0.5.1, in administrator moderation sessions. The CVSS 4.0 vector requires user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Grav Guestbook plugin before 0.5.2 contains a stored cross-site scripting vulnerability because its AJAX Load more and Admin Load all handlers insert stored author and message fields into the DOM as unescaped HTML via jQuery. Unauthenticated visitors can submit markup that executes in other visitors' browsers and, in versions 0.5.0 and 0.5.1, in administrator moderation sessions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.002 9th percentileScored 2026-11-07

Fix Fixed grav-plugin-guestbook (getgrav): 0.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
getgrav	grav-plugin-guestbook	before 0.5.2	0.5.2	Patch available	CNA

grav-plugin-guestbook Vendorgetgrav Affected before 0.5.2 Fixed in 0.5.2 Patch available CNA

Remediation

Update grav-plugin-guestbook to version 0.5.2, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA grav-plugin-guestbook (getgrav) Fixed in 0.5.2

Fixed in the same release

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

Release · 2026-10-12
getgrav grav-plugin-guestbook 0.5.2
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-71135 Missing authorization and CSRF in Grav Guestbook moderation actionsPriority LOW 23
Show all 2 records →

Timeline

2026-10-12 Threatist record created from CVE-2026-109322
2026-10-12 Alias added: GHSA-44rc-569f-hxfg
2026-10-15 CISA SSVC decision points changed

References

Advisory 1

GitHub Security Advisory (GHSA-jgpj-gchm-6j29)

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