CVE-2023-53878

MediumCVSS 6.9/10Last modified Jun 17, 2026

Description

Member Login Script 3.3 contains a client-side desynchronization vulnerability that allows attackers to manipulate HTTP request handling by exploiting Content-Length header parsing. Attackers can send crafted POST requests with smuggled secondary requests to potentially bypass server-side request processing controls.

Metrics

CVSS 4.0 6.9/10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/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

Weakness enumeration

CWE-444

Affected software

VendorProductVersions
PhpjabbersMember Login Script3.3

References

Timeline

Published
Dec 15, 2025
Last modified
Jun 17, 2026
NVD status
Deferred

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CVE-2023-53878: Medium severity, CVSS 6.9 | Vulnix