CVE-2025-9633: LH Signing <= 2.83 - Cross-Site Request Forgery

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-11 · updated 2026-09-30
Weakness: CWE-352

Description

The LH Signing plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.83. This is due to missing or incorrect nonce validation on the plugin_options function. This makes it possible for unauthenticated attackers to modify plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

shawfactor LH Signing: through 2.83

References

https://plugins.trac.wordpress.org/browser/lh-signing/trunk/lh-signing.php#L1870
https://plugins.trac.wordpress.org/browser/lh-signing/trunk/lh-signing.php#L1886
https://plugins.trac.wordpress.org/browser/lh-signing/trunk/partials/option-settings.php#L3
https://www.wordfence.com/threat-intel/vulnerabilities/id/fadd7934-bdd9-47e9-bd34-d162ff3b7cd4?source=cve

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