CVE-2026-61452

Grav before 2.0.4 Improper Session Invalidation JWT Access Tokens

Published Jul 15, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

The Grav API plugin before version 2.0.4 issues JSON Web Tokens that lack a JWT ID (jti) claim, preventing server‑side revocation. Consequently, access tokens remain valid for their full lifetime—defaulting to one hour—regardless of a user’s session termination, password change, or account disabling. An attacker in possession of such a token retains uninterrupted API access until the token naturally expires.

Affected Systems

The vulnerability affects the Grav content‑management system, specifically the getgrav/grav-plugin API component prior to version 2.0.4. Users operating the API plugin before the 2.0.4 update are vulnerable.

Risk and Exploitability

The CVSS score of 6.9 denotes moderate impact, while an EPSS score of less than 1 % indicates a low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires an attacker to possess a valid JWT, which can be obtained if the token is intercepted or if credentials are compromised; once acquired, the token can be used for continuous API access until expiration.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

getgrav

grav

unaffected

Version	Status	Constraints
`0`	affected	< 2.0.4
`2.0.4`	unaffected	—

No data.

Vendor Product Versions

Getgrav

Grav

Version	Status	Scheme	Platform
`[0,2.0.4)`	affected	generic	—
`2.0.4`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Grav to version 2.0.4 or later, where the API plugin implements proper token revocation.
Verify that the API plugin configuration enforces the inclusion of a jti claim in all issued JWTs and that server‑side revocation is enabled.
If an upgrade is not immediately possible, reduce the default access token lifetime to a short period (e.g., 15–30 minutes) and monitor for anomalous API activity.

Generated by OpenCVE AI on July 31, 2026 at 03:54 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.243% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/getgrav/grav/security/advisories/GHSA-m8g9-wxhx-6f86
https://www.vulncheck.com/advisories/grav-before-improper-session-invalidation-jwt-access-tokens

History

Jul 28, 2026 4:15 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:getgrav:grav::::::::

Jul 15, 2026 8:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Getgrav Getgrav grav
Vendors & Products		Getgrav Getgrav grav

Jul 15, 2026 2:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jul 15, 2026 12:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Grav before 2.0.4 Improper Session Invalidation JWT Access Tokens
Weaknesses		CWE-613
References		https://github.com/getgrav/grav/security/advisories/GHSA-m8g9-wxhx-6f86 https://www.vulncheck.com/advisories/grav-before-improper-session-invalidation-jwt-access-tokens
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}` cvssV4_0 `{'score': 6.9, 'vector': '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'}`