CVE-2026-110230: XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-04 15:41 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by VulnCheck, published 2026-10-13).
Weakness: Missing Authorization
How it can be exploited
Exploitable over the network with low attack complexity with no special attack requirements needing low privileges and no user interaction. Impact: confidentiality none, integrity low, availability low. CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: partial.
Public exploit evidence (Exploit Observer)
Exploit Observer found 3 code repositories naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 6 references on Exploit Observer
Live scores
- EPSS
- 0.003
low predicted chance of attack - VEDAS
- 0.986
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- Suricata
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| sergix44 XBackBone | up to and including 3.8.2 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Vendor guidance:
- https://github.com/sergix44/xbackbone/pull/671 (patch, issue-tracking)
- https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221 (patch)
How to detect it
Suricata rules (network detection)
1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-110230 XBackBone - Vanity Share Code Missing Authorization. Add them to your Suricata rule set and reload.
Show the rules
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-110230 XBackBone - Vanity Share Code Missing Authorization"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/upload/"; nocase; content:"/vanity"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-110230; reference:url,https://www.exploit.observer/?keyword=CVE-2026-110230&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=xbackbone&match=exact; sid:1084402; rev:1;)
CVE-2026-110230.rules on GitHub
References
Vendor advisories and patches
- https://github.com/sergix44/xbackbone/pull/671 (patch, issue-tracking)
- https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221 (patch)
Technical analysis and advisories
- 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)
- VulnCheck Advisory: XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint (third-party-advisory)
Other references
- https://github.com/sergix44/xbackbone (product)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
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