CVE-2026-110103
bbs-go through 4.4.6 Stored XSS via Image Upload Content-Type
mlogclub bbs-go
CVSS
5.1MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.23%Chance of exploitation activity in the next 30 days, higher than 12% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- bbs-goaffected: all versions through 4.4.6CVE List
References 6
- github.com/mlogclub/bbs-go/pull/306Fixvia CVE List
- github.com/mlogclub/bbs-go/commit/5bebf98bb9e0ac5162d4f8faf7a65fc0d496a362Fixvia CVE List
- vulncheck.com/advisories/bbs-go-through-4.4.6-stored-xss-via-image-upload-content-typeAdvisoryvia CVE List
- github.com/mlogclub/bbs-go/issues/305Referencevia CVE List
- github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/uploader/uploader.go#L90-L121Referencevia CVE List
- github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/api/upload_handlers.go#L36-L54Referencevia CVE List