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Vulnerabilities

Vulnerability · CVE-2025-12813

The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter.

Published Nov 11, 2025 · catalog updated Apr 8, 2026 · Holiday class post calendar

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-12813. EPSS is 0.91%. Act only if a listed version of Holiday class post calendar is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.91%
Remediation
Vendor / distro source
Affected products
vendor strix-bubol5 Holiday class post calendar 0 ≤7.1

The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter. This is due to a lack of sanitization of user-supplied data when creating a cache file. This makes it possible for unauthenticated attackers to execute code on the server.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor strix-bubol5 Holiday class post calendar 0 ≤7.10 ≤7.1

How to fix CVE-2025-12813

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-12813. EPSS is 0.91%. Act only if a listed version of Holiday class post calendar is installed.

Which versions are affected?

Compare what you have installed with strix-bubol5 Holiday class post calendar 0 ≤7.1 0 ≤7.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.91%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 11, 2025 · EUVD

    Detected

    The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter. This is due to a lack of sanitization of user-supplied data when creating a cache file. This makes it possible for unauthenticated attackers to execute code on the server.

  2. Apr 8, 2026 · EUVD

    Updated

    The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter. This is due to a lack of sanitization of user-supplied data when creating a cache file. This makes it possible for unauthenticated attackers to execute code on the server.

Sources

  • CVE.orgVulnerability recordCVE-2025-12813

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12813

    30-day exploitation probability 0.91%

    first.org
  • EUVDVulnerability recordEUVD-2025-60947

    The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter. This is due to a lack of sanitization of user-supplied data when creating a cache file. This makes it possible for u

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgOct 24, 2026
  • EUVDOct 24, 2026