CVE-2026-110230
XBackBone through 3.8.2 contains a missing authorization vulnerability that allows authenticated users to change other users' upload share codes via the POST /upload/{id}/vanity route.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
Description
XBackBone through 3.8.2 contains a missing authorization vulnerability that allows authenticated users to change other users' upload share codes via the POST /upload/{id}/vanity route. Attackers can supply sequential upload ids to MediaController::createVanity() to break existing share links and hijack the freed codes with their own uploads.
- CVSS 4.0
- 5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.31% probability · 24th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Source
- disclosure@vulncheck.com
EPSS moved from 0.3% on 14 October 2026 to 0.3% on 26 October 2026.
References
- https://github.com/sergix44/xbackbone
- https://github.com/sergix44/xbackbone/blob/226af4f0cec218f563da6d53ececfa4708e6f3e7/app/Controllers/MediaController.php#L204-L229
- https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221
- https://github.com/sergix44/xbackbone/pull/671
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ByAj-Xoifl
- https://www.vulncheck.com/advisories/xbackbone-through-3.8.2-missing-authorization-via-upload-vanity-endpoint
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.