CVE-2021-24332: Autoptimize < 2.8.4 - Authenticated Stored Cross-Site Scripting (XSS)

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-24 · updated 2026-06-17
Weakness: CWE-79

Description

The Autoptimize WordPress plugin before 2.8.4 was missing proper escaping and sanitisation in some of its settings, allowing high privilege users to set XSS payloads in them, leading to stored Cross-Site Scripting issues

Affected products

Autoptimize: before 2.8.4 — fixed in 2.8.4

How to fix

Upgrade to a fixed version: Autoptimize 2.8.4. Check the vendor advisory for mitigations.

References

https://m0ze.ru/vulnerability/%5B2021-04-01%5D-%5BWordPress%5D-%5BCWE-79%5D-Autoptimize-WordPress-Plugin-v2.8.3.txt
https://wpscan.com/vulnerability/6678e064-ce21-4bb2-8c50-061073fb22fb
https://m0ze.ru/vulnerability/%5B2021-04-01%5D-%5BWordPress%5D-%5BCWE-79%5D-Autoptimize-WordPress-Plugin-v2.8.3.txt
https://wpscan.com/vulnerability/6678e064-ce21-4bb2-8c50-061073fb22fb

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