PT-2026-5176 · Bitnami+2 · Discourse

Published 2026-01-28 · Updated 2026-02-02 · CVE-2025-66488

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 3.5.4 Discourse versions prior to 2025.11.2 Discourse versions prior to 2025.12.1 Discourse versions prior to 2026.1.0

Description An issue exists in the open source discussion platform affecting users who utilize S3 for uploads. This allows for the execution of scripts, although they are restricted to the context of the S3/CDN domain and do not have access to site credentials.

Recommendations Update to version 3.5.4. Update to version 2025.11.2. Update to version 2025.12.1. Update to version 2026.1.0. As a temporary workaround, disallow html or xml files for uploads in authorized extensions and delete existing html or xml uploads.

Exploit

Fix

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-116

Related Identifiers

BIT-DISCOURSE-2025-66488

CVE-2025-66488

GHSA-68JP-3934-62RX

Affected Products

Discourse

References · 5

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66488.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-66488 · Security Note
• https://osv.dev/vulnerability/BIT-discourse-2025-66488 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-66488 · Vendor Advisory
• https://github.com/discourse/discourse/security/advisories/GHSA-68jp-3934-62rx · Note