Description
The WP Discourse plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 2.5.9. This is due to the plugin unconditionally sending Discourse API credentials (Api-Key and Api-Username headers) to any host specified in a post's discourse_permalink custom field during comment synchronization. This makes it possible for authenticated attackers, with author-level access and above, to exfiltrate sensitive Discourse API credentials to attacker-controlled servers, as well as query internal services and potentially perform further attacks.
References (5)
Core 5
Core References
Product
https://plugins.trac.wordpress.org/browser/wp-discourse/tags/2.5.9/lib/discourse-comment.php#L211
Product
https://plugins.trac.wordpress.org/browser/wp-discourse/tags/2.5.9/lib/discourse-comment.php#L218
Scores
CVSS v3
4.3
EPSS
0.0022
EPSS Percentile
12.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (1)
scossar/WP Discourse
< 2.5.9
Published
Nov 01, 2025
Tracked Since
Feb 18, 2026