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Vulnerability record · CVE-2026-27742 · published 23 February 2026

CVE-2026-27742: Bludit cross-site scripting vulnerability

Bludit · Bludit

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.

5.1 CVSS 4.0 Medium EPSS 0.24% · top 85.8% CWE-79 · Cross-site scripting
5.1CVSS 4.0 base score
0.24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
14 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bludit/bludit/issues/1579 ExploitIssue Tracking
https://www.vulncheck.com/advisories/bludit-stored-xss-in-post-content Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-18879Bludit unrestricted file upload vulnerabilityUnrestricted File Upload in Bludit v3.8.1 allows remote attackers to execute arbitrary code by uploading malicious files via the component 'bl-kereln…EPSS 3.1%9.8CVE-2019-17240Bludit improper restriction of authentication attempts vulnerabilitybl-kernel/security.class.php in Bludit 3.9.2 allows attackers to bypass a brute-force protection mechanism by using many different forged X-Forwarded…EPSS 40%9.1CVE-2020-20495Bludit vulnerabilitybludit v3.13.0 contains an arbitrary file deletion vulnerability in the backup plugin via the `deleteBackup' parameter.EPSS 1.5%9.1CVE-2020-18190Bludit path traversal vulnerabilityBludit v3.8.1 is affected by directory traversal. Remote attackers are able to delete arbitrary files via /admin/ajax/upload-profile-picture.EPSS 2.0%8.9CVE-2024-24551Bludit command injection vulnerabilityA security vulnerability has been identified in Bludit, allowing authenticated attackers to execute arbitrary code through the Image API. This vulner…EPSS 0.76%8.9CVE-2024-24550Bludit command injection vulnerabilityA security vulnerability has been identified in Bludit, allowing attackers with knowledge of the API token to upload arbitrary files through the File…EPSS 0.69%8.8CVE-2020-20210Bludit unrestricted file upload vulnerabilityBludit 3.9.2 is vulnerable to Remote Code Execution (RCE) via /admin/ajax/upload-images.EPSS 1.3%8.8CVE-2023-31572Bludit vulnerabilityAn issue in Bludit 4.0.0-rc-2 allows authenticated attackers to change the Administrator password and escalate privileges via a crafted request.EPSS 0.84%

Source: NIST National Vulnerability Database (record CVE-2026-27742), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.