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 3.16.1 contains a cross-site request forgery (CSRF) vulnerability in the /admin/uninstall-plugin/ and /admin/install-theme/ endpoints. The application does not implement anti-CSRF tokens or other request origin validation mechanisms for these administrative actions. An attacker can induce an authenticated administrator to visit a malicious page that silently submits crafted requests, resulting in unauthorized plugin uninstallation or theme installation. This may lead to loss of functionality, execution of untrusted code via malicious themes, and compromise of system integrity.
CVSS Score
5.1
EPSS Score
0.0
Published
2026-02-23
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
Bludit versions before 3.13.1 contain an authenticated file download vulnerability in the Backup Plugin that allows logged-in users to access arbitrary files. Attackers can exploit the plugin's download functionality by manipulating file path parameters to read sensitive system files through directory traversal.
CVSS Score
7.1
EPSS Score
0.004
Published
2025-12-17
Bludit uses predictable methods in combination with the MD5 hashing algorithm to generate sensitive tokens such as the API token and the user token. This allows attackers to authenticate against the Bludit API.
CVSS Score
6.0
EPSS Score
0.001
Published
2024-06-24
Bludit uses the SHA-1 hashing algorithm to compute password hashes. Thus, attackers could determine cleartext passwords with brute-force attacks due to the inherent speed of SHA-1. In addition, the salt that is computed by Bludit is generated with a non-cryptographically secure function.
CVSS Score
5.9
EPSS Score
0.001
Published
2024-06-24
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 session fixation vulnerability in Bludit allows an attacker to bypass the server's authentication if they can trick an administrator or any other user into authorizing a session ID of their choosing.
CVSS Score
5.6
EPSS Score
0.0
Published
2024-06-24
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