Read the docs
TI-2026-03837 Aliases CVE-2026-4420GHSA-w5x8-257x-9rv5

Stored XSS via Page Creating functionality in Bludit

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · Low · 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 page creating functionality. An authenticated attacker with page creation privileges (such as Author, Editor, or Administrator) can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be executed when a victim visits the URL of the uploaded resource. The uploaded resource itself is accessible without authentication. Critically, this vulnerability could be used to automatically create a new site administrator if the victim has enough privileges.  The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 3.17.2 and 3.18.0 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00164 5th 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

VendorProductAffected versionsFixed inStatusSource
BluditBludit3.17.2; 3.18.0—No fix listedCNA
  • Bludit VendorBludit Affected 3.17.2; 3.18.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:bludit:bludit:3.17.2:*:*:*:*:*:*:*3.17.2VulnerableBludit
cpe:2.3:a:bludit:bludit:3.18.0:*:*:*:*:*:*:*3.18.0VulnerableBludit
  • cpe:2.3:a:bludit:bludit:3.17.2:*:*:*:*:*:*:* Versions 3.17.2 Vulnerable ·Bludit
  • cpe:2.3:a:bludit:bludit:3.18.0:*:*:*:*:*:*:* Versions 3.18.0 Vulnerable ·Bludit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4420
  2. 2026-10-03 Alias added: GHSA-w5x8-257x-9rv5

References

Advisory 1

Other 1

  • 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