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TI-2021-02749 Aliases CVE-2021-3818GHSA-cg3q-59w7-rvc2

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

Priority LOW 29CWE-565Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

grav is vulnerable to Reliance on Cookies without Validation and Integrity Checking

Why it matters now

EPSS 0.02452 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed getgrav/grav (getgrav): 1.7.22getgrav/grav (Packagist): 1.7.21

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
getgravgetgrav/gravbefore 1.7.221.7.22Patch availableCNA
—getgrav/grav (Packagist)before 1.7.211.7.21Patch availableGHSA-cg3q-59w7-rvc2
  • getgrav/grav Vendorgetgrav Affected before 1.7.22 Fixed in 1.7.22 Patch available CNA
  • getgrav/grav (Packagist) Vendor— Affected before 1.7.21 Fixed in 1.7.21 Patch available GHSA-cg3q-59w7-rvc2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*before 1.7.22Vulnerablegetgrav
  • cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* Versions before 1.7.22 Vulnerable ·getgrav

Remediation

  • Fix · CNA getgrav/grav (getgrav) Fixed in 1.7.22
  • Fix · GHSA-cg3q-59w7-rvc2 getgrav/grav (Packagist) Fixed in 1.7.21 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3818
  2. 2026-10-03 Alias added: GHSA-cg3q-59w7-rvc2

References

Exploit 1

Advisory 1

Other 1

  • 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-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3
  • TI-2025-41064 In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig… CVSS 3.1CRITICAL 9.1
  • TI-2026-30888 Grav: Unauthenticated Path Traversal & Arbitrary File Write in FormFlash component. CVSS 4.0HIGH 8.8
  • TI-2025-40773 Security Sandbox Bypass with SSTI (Server Side Template Injection) in the Grav CMS CVSS 3.1HIGH 8.8
  • TI-2025-40768 Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass CVSS 4.0HIGH 8.7
See all 56 →

Sources

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