| Title | FOSSBilling >= 0.1.0, <= 0.8.6 Exposure of Access Control List Files to an Unauthorized Control |
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| Description | A path-traversal flaw in the guest/system/template_exists API endpoint lets any unauthenticated attacker probe whether arbitrary files and directories exist anywhere on the server filesystem by submitting .. sequences in the file parameter; the boolean result is returned verbatim, breaking the intended restriction to the active theme directory. |
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| Source | ⚠️ https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-fm3x-cx5r-wwgp |
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| User | mikannse (UID 100854) |
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| Submission | 10/08/2026 03:51 (17 days ago) |
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| Moderation | 10/21/2026 12:48 (13 days later) |
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| Status | Duplicate |
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| VulDB entry | 422423 [FOSSBilling up to 0.8.6 Path Join template_exists Path::join file path traversal] |
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| Points | 0 |
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