EUVD-2026-69650
GHSA-46j6-w3hw-4r9x
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable endpoint, low complexity given PHPGGC tooling, requires authenticated low-privilege session; no scope change as execution stays within web server process.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
PHP object injection in Cypht before 2.12.2 allows authenticated users to execute arbitrary OS commands as the web server process by submitting a crafted serialized payload via the logout handler. The back_query GET parameter is base64-decoded and passed directly to PHP's unserialize() with no allow-list, signature check, or type restriction, enabling gadget-chain exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session on the target Cypht instance (PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N, score 8.7) correctly reflects network reachability, low complexity, and low-privilege authentication as the primary gate. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Cypht v2.12.2 or later, which resolves the issue by removing deserialization of the logout `back_query` parameter entirely (PR #2073, commit e4aa2f34e33f9328e8c93514cc3966fc3d99925e). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Cypht and identify instances below version 2.12.2; verify user access levels to these systems. …
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External POC / Exploit Code
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