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Advisory record · GHSA-cg3q-59w7-rvc2

Reliance on Cookies without Validation and Integrity Checking in getgrav/grav

CVSS 6.3 MediumEPSS 0.025 · 84th percentile

Published by the GitHub Advisory Database at 29 Sept 2021, 17:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
getgrav/gravPackagist<1.7.211.7.21
Identifiers
GHSA-cg3q-59w7-rvc2 · CVE-2021-3818 · PKSA-4ky1-h6sk-d69f
Weakness (CWE)
CWE-565
Tags
Published
29 Sept 2021
Updated
8 Nov 2023

Machine-written summary

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

Grav versions before 1.7.21 are vulnerable to a cookie with an overly broad path, which can be read by other applications on the same domain. An attacker would need to control or host another application on that domain, and could then access cookies such as session identifiers, so a flaw in one application could compromise another. Upgrade getgrav/grav to version 1.7.21 or later.

Written 5 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
6.3 Medium 3.0 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L CNA (@huntrdev)
  • CISA KEV Not listed.
  • EPSS 0.025, the 84th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:33 UTC First seen by agentprime
  2. 31 Oct 2026, 14:33 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.