CVE-2021-36841: Authenticated Stored Cross-Site Scripting (XSS) vulnerability in YITH Maintenance Mode (WordPress plugin) versions <= 1.3.7, vulnerable parameter &yith_maintenance_newsletter_submit_label. Possible ev

medium Affects yith-maintenance-mode (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2021-09-27; advisory modified 2026-06-17.

Authenticated Stored Cross-Site Scripting (XSS) vulnerability in YITH Maintenance Mode (WordPress plugin) versions <= 1.3.7, vulnerable parameter &yith_maintenance_newsletter_submit_label. Possible ev

Package: yith-maintenance-mode (WordPress plugin) WordPress
Affected versions: <=1.3.7
Fixed in: no fix recorded
Severity: medium CVSS 6.9
Exploitation: not on CISA KEV · EPSS 1% (50.1th percentile)
Published: 2021-09-27
Source: nvd

References

CWE-79

NVD record yith-maintenance-mode (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-2015-9429 medium The yith-maintenance-mode plugin before 1.2.0 for WordPress has CSRF with resultant XSS vi same package: yith-maintenance-mode (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
CVE-2022-3562 medium Cross-site Scripting in librenms/librenms same weakness: CWE-79
CVE-2022-4067 medium Cross-site Scripting in librenms/librenms same weakness: CWE-79