What’s Vulnerable › Vulnerabilities

CVE-2022-3861: Betheme <= 26.5.1.4 - Authenticated (Subscriber+) PHP Object Injection

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-11-21 · updated 2026-06-17
• Weakness: CWE-502

Description

The Betheme theme for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 26.5.1.4 via deserialization of untrusted input supplied via the import, mfn-items-import-page, and mfn-items-import parameters passed through the mfn_builder_import, mfn_builder_import_page, importdata, importsinglepage, and importfromclipboard functions. This makes it possible for authenticated attackers, with subscriber level permissions and above to inject a PHP Object. The additional presence of a POP chain would make it possible for attackers to execute code, retrieve sensitive data, delete files, etc..

Affected products

• MuffinGroup Betheme: before 26.6 — fixed in 26.6

How to fix

Upgrade to a fixed version: MuffinGroup Betheme 26.6. Check the vendor advisory for mitigations.

References

• https://github.com/MrTuxracer/advisories/blob/master/CVEs/CVE-2022-3861.txt
• https://muffingroup.com/betheme/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f5e984d5-2537-4a4a-a071-084e0c1c3b5e?source=cve
• https://www.wordfence.com/vulnerability-advisories-continued/#CVE-2022-3861
• https://github.com/MrTuxracer/advisories/blob/master/CVEs/CVE-2022-3861.txt
• https://muffingroup.com/betheme/
• https://www.wordfence.com/vulnerability-advisories-continued/#CVE-2022-3861

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