TI-2026-20266 Aliases CVE-2026-25100 GHSA-8v3q-hmmj-942m

Stored XSS via SVG File Upload in Bludit

LOW 21CWE-79Published 2026-03-27 · Updated 2026-03-27

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00198 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Bludit	Bludit	up to 3.18.2	—	No fix listed	CNA

Bludit VendorBludit Affected up to 3.18.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:bludit:bludit::::::::	before 3.18.2	Vulnerable	Bludit

cpe:2.3:a:bludit:bludit:*:*:*:*:*:*:*:* Versions before 3.18.2 Vulnerable ·Bludit

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-25100
2026-10-03 Alias added: GHSA-8v3q-hmmj-942m

References

Advisory 1

https://cert.pl/posts/2026/03/CVE-2026-25099

Other 1

https://github.com/bludit/bludit/releases/tag/3.18.2

TI-2019-12105 Bludit 3.9.2 allows remote code execution via bl-kernel/ajax/upload-images.php because… CVSS 3.1HIGH 8.8
TI-2024-16173 Bludit - Remote Code Execution (RCE) through Image API CVSS 4.0HIGH 8.9
TI-2024-16172 Bludit - Remote Code Execution (RCE) through File API CVSS 4.0HIGH 8.9
TI-2023-15122 An issue in Bludit 4.0.0-rc-2 allows authenticated attackers to change the Administrator… CVSS 3.1HIGH 8.8
TI-2020-13782 Bludit 3.9.2 is vulnerable to Remote Code Execution (RCE) via /admin/ajax/upload-images. CVSS 3.1HIGH 8.8
TI-2019-12856 bl-kernel/security.class.php in Bludit 3.9.2 allows attackers to bypass a brute-force… CVSS 3.1CRITICAL 9.8

See all 41 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences