CVE-2023-53878 - CVE House
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Status published Medium CVE-2023-53878

Member Login Script 3.3 Client-Side Request Desynchronization Vulnerability

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • nu11secur1ty

References

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Critical 9.3

Affected Vendor

Affected Software

Member Login Script
Vulnerable Versions:
3.3

Timeline

Official Publish: December 15th, 2025
Last Modified: May 12th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-444

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1565.002 Stored Data Manipulation
Impact
T1078 Valid Accounts
Defense Evasion