PatchSiren cyber security CVE debrief
CVE-2026-8841 andrewabarber CVE debrief
The Extra Settings for RocketChat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'rocketchat' shortcode's 'title' attribute in versions up to, and including, 0.1. This is due to insufficient input sanitization and output escaping in the rxstg_shortcode() function, which concatenates the user-supplied 'title' attribute directly into HTML output. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
- Vendor
- andrewabarber
- Product
- Extra Settings for RocketChat
- CVSS
- MEDIUM 6.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-09
- Original CVE updated
- 2026-06-09
- Advisory published
- 2026-06-09
- Advisory updated
- 2026-06-09
Who should care
Users of the Extra Settings for RocketChat plugin for WordPress, particularly those with contributor-level access and above, should be aware of this vulnerability and take steps to mitigate it.
Technical summary
The vulnerability exists in the rxstg_shortcode() function, which fails to properly sanitize and escape user-supplied input in the 'title' attribute of the 'rocketchat' shortcode. This allows authenticated attackers to inject arbitrary web scripts.
Defensive priority
MEDIUM
Recommended defensive actions
- Update the Extra Settings for RocketChat plugin to a version that fixes this vulnerability.
- Limit contributor-level access and above to trusted users.
- Monitor pages for injected scripts.
Evidence notes
The CVE-2026-8841 record and NVD detail provide information on this vulnerability. Additional references include Wordfence threat intel and plugin code.
Official resources
CVE-2026-8841 was published on 2026-06-09T05:16:39.507Z and modified on 2026-06-09T13:33:34.393Z.