Vulnerability · Published Mar 27, 2026 · Assigned by CERT-PL

CVE-2026-25100Stored XSS via SVG File Upload in Bludit

Medium 4.8

In plain English

A medium-severity cross-site scripting in Bludit from Bludit. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 4.0)4.8Medium

Exploit odds (30 days)0.2%top 90.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Bludit	Bludit	0 – through 3.18.2

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://cert.pl/posts/2026/03/CVE-2026-25099 third-party-advisory
https://github.com/bludit/bludit/releases/tag/3.18.2 release-notes