CVE-2026-17577 | The SSL Zen plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'uri' (and 'host') parameters in versions up to, and including, 4.7.42. The ssl_zen_messages::getMessages() function builds the 'token_missmatch' message using base64_decode(sanitize_text_field($_REQUEST['uri'])) and (optionally) base64_decode(sanitize_text_field($_REQUEST['host'])). sanitize_text_field() cannot strip HTML/JavaScript that is hidden inside a base64-encoded
The SSL Zen plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'uri' (and 'host') parameters in versions up to, and including, 4.7.42. The ssl_zen_messages::getMessages() function builds the 'token_missmatch' message using base64_decode(sanitize_text_field($_REQUEST['uri'])) and (optionally) base64_decode(sanitize_text_field($_REQUEST['host'])). sanitize_text_field() cannot strip HTML/JavaScript that is hidden inside a base64-encoded blob, and the resulting decoded raw HTML is echoed unescaped by showMessage() . This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.
- 🔗 www.wordfence.com/threat-intel/vulnerabilities/id/20816039-…
- 🔗 plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.14/ssl_zen/class…
- 🔗 plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.42/ssl_zen/class…
- 🔗 plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.42/ssl_zen/class…
- 🔗 plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.14/ssl_zen/class…
- 🔗 plugins.trac.wordpress.org/changeset
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| Tier | 2026-09-17 | 2026-09-30 |
|---|---|---|
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| ≥10 % | 0 | 2 |
| <10 % | 300 | 424 |
CVE-2026-17577 | The SSL Zen plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'uri' (and 'host') parameters in versions up to, and including, 4.7.42. The ssl_zen_messages::getMessages() function builds the 'token_missmatch' message using base64_decode(sanitize_text_field($_REQUEST['uri'])) and (optionally) base64_decode(sanitize_text_field($_REQUEST['host'])). sanitize_text_field() cannot strip HTML/JavaScript that is hidden inside a base64-encoded
The SSL Zen plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'uri' (and 'host') parameters in versions up to, and including, 4.7.42. The ssl_zen_messages::getMessages() function builds the 'token_missmatch' messa
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