Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck
CVE-2026-110230XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint
Medium 5.4
In plain English
A medium-severity missing authorization in XBackBone from sergix44. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 76.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
References
- https://github.com/sergix44/xbackbone/pull/671 patch, issue-tracking
- https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221 patch
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ByAj-Xoifl third-party-advisory
- https://github.com/sergix44/xbackbone/blob/226af4f0cec218f563da6d53ececfa4708e6f3e7/app/Controllers/MediaController.php#L204-L229 technical-description
- https://github.com/sergix44/xbackbone product
- VulnCheck Advisory: XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint third-party-advisory