CVE-2023-4971: Weaver Xtreme Theme Support < 6.3.1 - Admin+ PHP Object Injection

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-10-16 · updated 2026-06-17
Weakness: CWE-502

Description

The Weaver Xtreme Theme Support WordPress plugin before 6.3.1 unserialises the content of an imported file, which could lead to PHP object injections issues when a high privilege user import a malicious file and a suitable gadget chain is present on the blog.

Affected products

wpweaver Weaver Xtreme Theme Support: before 6.3.1 — fixed in 6.3.1

How to fix

Upgrade to a fixed version: wpweaver Weaver Xtreme Theme Support 6.3.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/421194e1-6c3f-4972-8f3c-de1b9d2bcb13
https://wpscan.com/vulnerability/421194e1-6c3f-4972-8f3c-de1b9d2bcb13

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