CVE-2021-24327: SEO Redirection < 6.4 - 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: 2021-05-17 · updated 2026-06-17
Weakness: CWE-79

Description

The SEO Redirection Plugin – 301 Redirect Manager WordPress plugin before 6.4 did not sanitise the Redirect From and Redirect To fields when creating a new redirect in the dashboard, allowing high privilege users (even with the unfiltered_html disabled) to set XSS payloads

Affected products

Clogica Seo Redirection Plugin: before 6.4 — fixed in 6.4

How to fix

Upgrade to a fixed version: Clogica Seo Redirection Plugin 6.4. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/ca8068f7-dcf0-44fd-841d-d02987220d79
https://wpscan.com/vulnerability/ca8068f7-dcf0-44fd-841d-d02987220d79

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