CVE-2026-121776

WordPress Passster plugin <= 4.3.20 - Broken Access Control vulnerability

Medium 6.5

Description

Missing Authorization vulnerability in WP Chill Passster content-protector allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Passster: from n/a through 4.3.20.

Key facts

Published: 13 Nov 2026
Last changed: 13 Nov 2026
Assigned by: Patchstack
EPSS: 0.246% likely to be exploited in the next 30 days, higher than 15.988% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: none; Automatable: yes; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

6.5CVSS 3.1, Mediumfrom the CNA (Patchstack)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

What to do

Update the WordPress Passster plugin to the latest available version (at least 4.3.21).CNA solution statement

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

Exploiting Incorrectly Configured Access Control Security Levels (CNA impact statement)

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
WP Chill	Passster	Default status: unaffected 0 up to and including 4.3.20 (affected); at 4.3.21 unaffected

Timeline

13 Nov 2026 Published

Weakness

CWE-862

References

patchstack.comvdb-entry