CVE-2023-53878 MEDIUM

CVE-2023-53878: Member Login Script 3.3 Client-Side Request Desynchronization Vulnerability

Vendor Phpjabbers
Product Member Login Script
Weakness CWE-444
Published December 15, 2025
Last update May 12, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 15, 2025 CVE published
May 12, 2026 Record updated