Bludit is vulnerable to Stored Cross-Site Scripting (XSS) in its image upload functionality. An authenticated attacker with content upload privileges (such as Author, Editor, or Administrator) can upload an SVG file containing a malicious payload, which is executed when a victim visits the URL of the uploaded resource. The uploaded resource itself is accessible without authentication.
The vendor was notified early about this vulnerability, but stopped responding in the middle of coordination. All versions up to 3.18.2 are considered to be vulnerable, future versions might also be vulnerable.
CVSS Score
4.8
EPSS Score
0.0
Published
2026-03-27
Bludit allows user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. This behavior enables an attacker to fix a session ID
for a victim and later hijack the authenticated session.
This issue was fixed in version 3.17.2.
CVSS Score
4.8
EPSS Score
0.001
Published
2026-03-27
Bludit’s API plugin allows an authenticated attacker with a valid API token to upload files of any type and extension without restriction, which can then be executed, leading to Remote Code Execution.
This issue was fixed in 3.18.4.
CVSS Score
8.7
EPSS Score
0.003
Published
2026-03-27
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 Score
5.1
EPSS Score
0.0
Published
2026-02-23
A security vulnerability has been identified in Bludit, allowing authenticated attackers to execute arbitrary code through the Image API. This vulnerability arises from improper handling of file uploads, enabling malicious actors to upload and execute PHP files.
CVSS Score
8.9
EPSS Score
0.002
Published
2024-06-24
A vulnerability was found in Bludit 3.13.1. It has been declared as problematic. This vulnerability affects the endpoint /admin/new-content of the New Content module. The manipulation of the argument content with the input <script>alert(1)</script> leads to cross site scripting. The attack can be initiated remotely but requires an authentication. The exploit has been disclosed to the public and may be used.
CVSS Score
3.5
EPSS Score
0.003
Published
2022-05-05
A Stored Cross Site Scripting (XSS) vulnerability exists in bludit 3.13.1 via the TAGS section in login panel.
CVSS Score
5.4
EPSS Score
0.03
Published
2022-01-06
A Stored Cross Site Scripting (XSS) vulnerability exists in Bludit 3.13.1 via the About Plugin in login panel.
CVSS Score
5.4
EPSS Score
0.027
Published
2022-01-06
Cross Site Scripting (XSS) vulnerability exists in bludit 3-13-1 via the username in admin/login.
CVSS Score
6.1
EPSS Score
0.03
Published
2021-10-19
A code injection vulnerability in backup/plugin.php of Bludit 3.13.1 allows attackers to execute arbitrary code via a crafted ZIP file.
CVSS Score
7.8
EPSS Score
0.005
Published
2021-07-23
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