CVE-2026-27742: Bludit <= 3.16.2 Stored XSS in Post Content

Severity: medium (CVSS 5.4 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: yes
Published: 2026-02-23 · updated 2026-07-14
Weakness: CWE-79

Description

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.

Affected products

Bludit: before 3.16.2 — fixed in 3.16.2

How to fix

Upgrade to a fixed version: Bludit 3.16.2. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-27742 or the next vulnerability affects your stack