What’s Vulnerable › Vulnerabilities

CVE-2026-110230: XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-13 · updated 2026-10-13
• Weakness: CWE-862

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

• sergix44 XBackBone: through 3.8.2

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

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