bbs-go through 4.4.6 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML or SVG files by spoofing the multipart Content-Type in POST /api/upload. Attackers can upload script-bearing documents served inline from /res and send their URLs to administrators, executing script on the forum's origin.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/api/upload_han…
disclosure@vulncheck.com
https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/uploader/uploader.g…
disclosure@vulncheck.com
https://github.com/mlogclub/bbs-go/commit/5bebf98bb9e0ac5162d4f8faf7a65fc0d496a…
disclosure@vulncheck.com
https://github.com/mlogclub/bbs-go/issues/305
disclosure@vulncheck.com
https://github.com/mlogclub/bbs-go/pull/306
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-stored-xss-via-image-…
disclosure@vulncheck.com