CVE-2015-9361: The Related Posts plugin before 1.8.2 for WordPress has XSS via add_query_arg() and remove_query_arg().

medium Affects related-posts (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published 2019-08-28; advisory modified 2026-06-17.

The Related Posts plugin before 1.8.2 for WordPress has XSS via add_query_arg() and remove_query_arg().

Package: related-posts (WordPress plugin) WordPress
Affected versions: <1.8.2
Fixed in: 1.8.2
Severity: medium CVSS 6.1
Exploitation: not on CISA KEV · EPSS 1% (62.6th percentile)
Published: 2019-08-28
Source: nvd

References

CWE-79

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.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   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-2013-3257 medium Cross-site request forgery (CSRF) vulnerability in the Related Posts plugin before 2.7.2 f same package: related-posts (WordPress plugin)
CVE-2021-24482 medium The Related Posts for WordPress plugin through 2.0.4 does not sanitise its heading_text an same package: related-posts (WordPress plugin)
CVE-2021-24180 medium Unvalidated input and lack of output encoding within the Related Posts for WordPress plugi same package: related-posts (WordPress plugin)
CVE-2020-11023 KEV medium Potential XSS vulnerability in jQuery same weakness: CWE-79
CVE-2019-9978 KEV medium The social-warfare plugin before 3.5.3 for WordPress has stored XSS via the wp-admin/admin same weakness: CWE-79
CVE-2020-11022 medium Potential XSS vulnerability in jQuery same weakness: CWE-79