CVE-2026-67351

Published: Jul 30, 2026Modified: Jul 31, 2026Deferred

8.7

Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

Description

Serendipity before 2.6.1 contains an authentication context confusion vulnerability where password validation and session loading operate independently without ensuring both use the same user record. An authenticated Editor can create a username collision with an Administrator account and obtain administrative privileges by logging in with their own password while the session loads the Administrator's account data.

Related CWEs

CWE-304

Missing Critical Step in Authentication

The product implements an authentication technique, but it skips a step that weakens the technique.

References (3)

https://github.com/s9y/Serendipity/security/advisories/GHSA-v645-243f-jwgh

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/serendipity-authentication-bypass-via-username-collision

Source: disclosure@vulncheck.com

https://github.com/s9y/Serendipity/security/advisories/GHSA-v645-243f-jwgh

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.