What’s Vulnerable › Vulnerabilities

CVE-2021-34641: SEOPress <= 5.0.0 – 5.0.3 Authenticated Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 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: 2021-08-16 · updated 2026-06-17
• Weakness: CWE-79

Description

The SEOPress WordPress plugin is vulnerable to Stored Cross-Site-Scripting via the processPut function found in the ~/src/Actions/Api/TitleDescriptionMeta.php file which allows authenticated attackers to inject arbitrary web scripts, in versions 5.0.0 - 5.0.3.

Affected products

• SEOPress: from 5.0.0 before 5.0.4 — fixed in 5.0.4

How to fix

Upgrade to a fixed version: SEOPress 5.0.4. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/wp-seopress/tags/5.0.4/src/Actions/Api/TitleDescriptionMeta.php#L78
• https://www.wordfence.com/blog/2021/08/xss-vulnerability-patched-in-seopress-affects-100000-sites/
• https://plugins.trac.wordpress.org/browser/wp-seopress/tags/5.0.4/src/Actions/Api/TitleDescriptionMeta.php#L78
• https://www.wordfence.com/blog/2021/08/xss-vulnerability-patched-in-seopress-affects-100000-sites/

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