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VulnerabilityPublished

CVE-2026-121574: Passster (WordPress plugin) · Missing Authorization

Affects Passster (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 4.3.21 when convenient.

Data as of 11 Nov 2026, 12:07 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Patchstack)CVSS 3.15.3
Patch
Available – fixed in 4.3.21
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade Passster (WordPress plugin) to 4.3.21.

Affected software

ProductAffectedFixed in
Passstercontent-protectorAffected
  • <4.3.21
Fixed in
  • 4.3.21

AI-suggested

Upgrade the WP Chill Passster plugin to version 4.3.21 or later, where this missing authorization vulnerability has been fixed. No other mitigation actions are indicated by the vendor.

Description

CVE-2026-121574 is a missing authorization vulnerability in the WP Chill Passster plugin, affecting versions before 4.3.21. The flaw allows bypassing access control security levels due to incorrect configuration, potentially exposing protected content. The vulnerability has a medium severity with a CVSS score of 5.3 and was fixed in version 4.3.21.

References

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