Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process.
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History
Wed, 02 Sep 2026 17:30:00 +0000
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Cypht-org
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Wed, 02 Sep 2026 10:45:00 +0000
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Tue, 01 Sep 2026 22:00:00 +0000
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| Description | Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process. | |
| Title | Cypht < 2.12.2 PHP Object Injection RCE via back_query Parameter | |
| Weaknesses | CWE-502 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-01T20:43:08.844Z
Updated: 2026-09-02T14:52:48.434Z
Reserved: 2026-08-08T16:43:04.179Z
Link: CVE-2026-71981
Updated: 2026-09-02T14:52:45.446Z
Status : Deferred
Published: 2026-09-01T21:18:36.310
Modified: 2026-09-08T20:18:59.270
Link: CVE-2026-71981
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