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Apocalypse Meow 21.1.3 — 21.2.7 - Authentication Bypass

bba4f30f-fc21-4387-a29e-4e4a115d7c3cPublished · Updated

Action summary

Affected: 21.1.3 – 21.2.7Update to 21.2.8 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-261 Weak Encoding for Password
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Apocalypse Meow apocalypse-meow

  1. Affected21.1.3 – 21.2.7
  2. Patched in21.2.8

Update to 21.2.8 or newer.

You are affected if you run 21.1.3 – 21.2.7. Version 21.2.8 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Apocalypse Meow.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 21.2.8, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Apocalypse Meow to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Steve.

The Apocalypse Meow plugin for WordPress is vulnerable to Authentication Bypass in versions 21.1.3 - 21.2.7. This is due to improper validation via bcrypt. This makes it possible for unauthenticated attackers to bypass the authentication check.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Apocalypse Meow

All 2
More vulnerabilities in Apocalypse Meow
SeverityVulnerabilityCVEPublished
Medium4.9Authenticated (Administrator+) SQL Injection via 'type' Parameter
≤22.1.0Update to 23.0.0
CVE-2026-3523

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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