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CVE-2021-34665: WP SEO Tags <= 2.2.7 Reflected Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% 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 WP SEO Tags WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the saq_txt_the_filter parameter in the ~/wp-seo-tags.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.2.7.

Affected products

• WP SEO Tags: through 2.2.7

References

• https://plugins.trac.wordpress.org/browser/wp-seo-tags/trunk/wp-seo-tags.php#L378
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34665
• https://plugins.trac.wordpress.org/browser/wp-seo-tags/trunk/wp-seo-tags.php#L378
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34665

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