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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00066.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Phpjabbers Member Login Script affected
Version Status Constraints
3.3 affected —

No data.

No data.

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Vendors Products
Phpjabbers Subscribe
Member Login Script Subscribe

Project Subscriptions

Vendors Products
Phpjabbers Subscribe
Member Login Script Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.exploit-db.com/exploits/51710 cve-icon cve-icon
https://www.phpjabbers.com/member-login-script/ cve-icon cve-icon
https://www.vulncheck.com/advisories/member-login-script-client-side-request-desynchronization-vulnerability cve-icon cve-icon
History

Tue, 16 Dec 2025 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Phpjabbers
Phpjabbers member Login Script
Vendors & Products Phpjabbers
Phpjabbers member Login Script

Mon, 15 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 15 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
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.
Title Member Login Script 3.3 Client-Side Request Desynchronization Vulnerability
Weaknesses CWE-444
References
Metrics cvssV4_0

{'score': 7.3, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2025-12-15T21:47:32.922Z

Reserved: 2025-12-13T14:25:04.999Z

Link: CVE-2023-53878

cve-icon Vulnrichment

Updated: 2025-12-15T21:40:19.308Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-15T21:15:50.563

Modified: 2025-12-16T14:10:11.300

Link: CVE-2023-53878

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-16T20:45:33Z

Weaknesses