XSS in Bludit
CVE-2026-25100
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Bludit — versions 0
Weakness classification (CWE)
References
- cert.pl/posts/2026/03/CVE-2026-25099 (Third Party Advisory, third-party-advisory)
- github.com/bludit/bludit/releases/tag/3.18.2 (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2026-25100?
- CVE-2026-25100 is a medium-severity vulnerability in Bludit, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-27.
- How severe is CVE-2026-25100?
- Medium severity. CVSS v3 base score is 5.4 out of 10.