CVE-2021-24976: Smart SEO Tool < 3.0.6 - Reflected Cross-Site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-24 · updated 2026-06-17
Weakness: CWE-79

Description

The Smart SEO Tool WordPress plugin before 3.0.6 does not sanitise and escape the search parameter before outputting it back in an attribute when the TDK optimisation setting is enabled, leading to a Reflected Cross-Site Scripting

Affected products

Smart SEO Tool – SEO优化插件: before 3.0.6 — fixed in 3.0.6

How to fix

Upgrade to a fixed version: Smart SEO Tool – SEO优化插件 3.0.6. Check the vendor advisory for mitigations.

References

https://plugins.trac.wordpress.org/changeset/2637305
https://wpscan.com/vulnerability/7d5f58a8-bee4-46be-9c08-d272678338f0
https://plugins.trac.wordpress.org/changeset/2637305
https://wpscan.com/vulnerability/7d5f58a8-bee4-46be-9c08-d272678338f0

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