CVE-2021-34632: SEO Backlinks <= 4.0.1 - Cross-Site Request Forgery to Stored Cross-Site Scripting

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-02 · updated 2026-06-17
Weakness: CWE-352

Description

The SEO Backlinks WordPress plugin is vulnerable to Cross-Site Request Forgery via the loc_config function found in the ~/seo-backlinks.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 4.0.1.

Affected products

SEO Backlinks: through 4.0.1

References

https://plugins.trac.wordpress.org/browser/seo-backlinks/trunk/seo-backlinks.php#L75
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34632
https://plugins.trac.wordpress.org/browser/seo-backlinks/trunk/seo-backlinks.php#L75
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34632

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