CVE-2026-25100
Stored XSS via SVG File Upload in Bludit
Description
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.
INFO
Published Date :
March 27, 2026, 12:16 p.m.
Last Modified :
April 1, 2026, 1:56 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Bludit to the latest version.
- Implement strict SVG file validation.
- Sanitize all user-supplied content.
- Restrict upload privileges where possible.
Public PoC/Exploit Available at Github
CVE-2026-25100 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-25100.
| URL | Resource |
|---|---|
| https://cert.pl/posts/2026/03/CVE-2026-25099 | Third Party Advisory |
| https://github.com/bludit/bludit/releases/tag/3.18.2 | Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-25100 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-25100
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-25100 vulnerability anywhere in the article.
-
cert.pl
Vulnerabilities in Bludit software
Vulnerabilities in Bludit software CVE ID CVE-2026-25099 Publication date 27 March 2026 Vendor Bludit Product Bludit Vulnerable versions All before 3.18.4 Vulnerability type (CWE) Unrestricted Upload ... Read more
The following table lists the changes that have been made to the
CVE-2026-25100 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:bludit:bludit:*:*:*:*:*:*:*:* versions up to (excluding) 3.18.2 Added Reference Type CERT.PL: https://cert.pl/posts/2026/03/CVE-2026-25099 Types: Third Party Advisory Added Reference Type CERT.PL: https://github.com/bludit/bludit/releases/tag/3.18.2 Types: Release Notes -
New CVE Received by [email protected]
Mar. 27, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:A/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:X/V:X/RE:X/U:X Added CWE CWE-79 Added Reference https://cert.pl/posts/2026/03/CVE-2026-25099 Added Reference https://github.com/bludit/bludit/releases/tag/3.18.2