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Advisory record · GHSA-729w-j79f-2c34

Grav may be vulnerable to SSRF attack via Twig Templates

CVSS 9.1 CriticalCriticalEPSS 0.0031 · 24th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 15 Dec 2025, 18:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
getgrav/gravPackagist<=1.7.49.5No fixed version yet
Identifiers
GHSA-729w-j79f-2c34 · CVE-2025-66844 · PKSA-ytd5-dvb1-2bq7
Weakness (CWE)
CWE-918
Tags
Published
15 Dec 2025
Updated
17 Dec 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Grav versions up to and including 1.7.49.5 are affected by a server-side request forgery issue. An attacker who can get Twig templates processed, through page content, can trigger requests from the server when the configuration allows undefined PHP functions to be registered. The source gives few details on the exact conditions. No fix is listed, so the source offers no fixed version; the reader could limit who can edit page content and review whether that configuration option is enabled.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0031, the 24th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:26 UTC First seen by agentprime
  2. 31 Oct 2026, 14:26 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.