XSS in Bludit
CVE-2026-27742
Bludit version 3.16.2 contains a stored cross-site scripting (XSS) vulnerability in the post content functionality. The application performs client-side sanitation of content input but does not enforce equivalent sanitation on the server side. An authenticated user can inject arbitrary JavaScript into the content field of a post, which is stored and later rendered to other users without proper output encoding. When viewed, the injected script executes in the context of the victim’s browser, allowing session hijacking, credential theft, content manipulation, or other actions within the user’s privileges.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.001 (3.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Bludit — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking, Exploit, Issue Tracking)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-27742?
- CVE-2026-27742 is a medium-severity vulnerability in Bludit, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-02-23.
- How severe is CVE-2026-27742?
- Medium severity. CVSS v3 base score is 5.4 out of 10.