CVE-2026-61452
MEDIUM Exploitation: PoC
5.3
CVSS 3.1
Description
The Grav API plugin (getgrav/grav-plugin-api) before 2.0.4 contains an improper session invalidation vulnerability where JWT access tokens are issued without a jti (JWT ID) claim and therefore cannot be revoked server-side. Unlike refresh tokens, access tokens remain valid for their full lifetime (default 1 hour) regardless of logout, password change, new token issuance, or account disablement. An attacker who has stolen an access token retains full API access until the token naturally expires.
Metadata
Severity & Metrics
5.3
MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC — CISA Coordinator
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| getgrav | grav | — | 0 < 2.0.4, 2.0.4 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-613 | cna | Insufficient Session Expiration |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 6.9 | MEDIUM | 4.0 | cna | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| 5.3 | MEDIUM | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References (2)
- GitHub Security Advisory (GHSA-m8g9-wxhx-6f86) https://github.com/getgrav/grav/security/advisories/GHSA-m8g9-wxhx-6f86
- VulnCheck Advisory: Grav before 2.0.4 Improper Session Invalidation JWT Access Tokens https://www.vulncheck.com/advisories/grav-before-improper-session-invalidation-jwt-access-tokens