CVE-2021-34637

8.8 highEPSS 0.7%

High (8.8) in post index project post index. EPSS 0.7% chance of exploitation in the next 30 days.

The Post Index WordPress plugin is vulnerable to Cross-Site Request Forgery via the OptionsPage function found in the ~/php/settings.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.7.5.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-352
Published: 2021-08-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

post_index_project:post_index

References

https://plugins.trac.wordpress.org/browser/post-index/trunk/php/settings.php#L86
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34637
https://plugins.trac.wordpress.org/browser/post-index/trunk/php/settings.php#L86
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34637

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