CVE-2021-34637: 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

high Affects post-index (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2021-08-02; advisory modified 2026-06-17.

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

Package: post-index (WordPress plugin) WordPress
Affected versions: <=0.7.5
Fixed in: no fix recorded
Severity: high CVSS 8.8
Exploitation: not on CISA KEV · EPSS 1% (53.0th percentile)
Published: 2021-08-02
Source: nvd

References

CWE-352

NVD record post-index (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2019-9787 high WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Ex same weakness: CWE-352
CVE-2016-6897 medium Cross-site request forgery (CSRF) vulnerability in the wp_ajax_update_plugin function in w same weakness: CWE-352
CVE-2022-1020 critical The Product Table for WooCommerce (wooproducttable) WordPress plugin before 3.1.2 does not same weakness: CWE-352
CVE-2019-12616 medium phpMyAdmin CSRF Vulnerability same weakness: CWE-352
CVE-2020-5776 high Cross-Site Request Forgery in MAGMI same weakness: CWE-352
CVE-2022-1574 critical The HTML2WP WordPress plugin through 1.0.0 does not have authorisation and CSRF checks whe same weakness: CWE-352