CVE-2025-66488
Essential information
- Published
- 28/01/2026 19:16
- Modified
- 29/01/2026 16:31
- Author
- —
- Creator
- —
- CVSS
- 4.6 MEDIUM (v3.1)
- CISA KEV
- No
- CWE
- —
- CVSS vector
-
—
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L—
CVSS metrics
- Access vector
- —
- Access complexity
- —
- Authentication
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- NETWORK
- Attack complexity
- LOW
- Privileges required
- LOW
- User interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality impact
- NONE
- Integrity impact
- LOW
- Availability impact
- LOW
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- —
- Attack complexity
- —
- Attack requirements
- —
- Privileges required
- —
- User interaction
- —
- Confidentiality (V)
- —
- Confidentiality (S)
- —
- Integrity (V)
- —
- Integrity (S)
- —
- Availability (V)
- —
- Availability (S)
- —
- Exploit maturity
- —
Description
Discourse is an open source discussion platform. A vulnerability present in versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 affects anyone who uses S3 for uploads. While scripts may be executed, they will only be run in the context of the S3/CDN domain, with no site credentials. Versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 fix the issue. As a workaround, disallow html or xml files for uploads in authorized_extensions. For existing html xml uploads, site owners can consider deleting them.
NVD status
- Status
- Undergoing Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| discourse / discourse | cpe:2.3:a:discourse:discourse:<3.5.4:*:*:*:*:*:*:* |
| discourse / discourse | cpe:2.3:a:discourse:discourse:3.5.4:*:*:*:*:*:*:* |
| discourse / discourse | cpe:2.3:a:discourse:discourse:2025.11.2:*:*:*:*:*:*:* |
| discourse / discourse | cpe:2.3:a:discourse:discourse:2025.12.1:*:*:*:*:*:*:* |
| discourse / discourse | cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:*:*:*:* |