PT-2025-51296 · Unknown · Member Login Script

Nu11Secur1Ty · Published 2025-12-15 · Updated 2025-12-21 · CVE-2023-53878

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Member Login Script version 3.3

Description The software contains a client-side desynchronization issue related to how HTTP requests are handled. Specifically, the vulnerability stems from the parsing of the Content-Length header. An attacker can craft malicious POST requests that include smuggled secondary requests. This manipulation can potentially bypass server-side request processing controls. The Content-Length header is a key component in this attack.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2023-53878

Affected Products

Member Login Script

References · 6

• 🔥 https://exploit-db.com/exploits/51710 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-53878 · Security Note
• https://twitter.com/CVEnew/status/2002857371908116638 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2000735547749257500 · Twitter Post
• https://phpjabbers.com/member-login-script · Note
• https://vulncheck.com/advisories/member-login-script-client-side-request-desynchronization-vulnerability · Note