Member Login Script 3.3 Client-Side Request Desynchronization Vulnerability
Priority LOW 37CWE-444Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| PHPJabbers | Member Login Script | 3.3 | — | No fix listed | CNA |
- Member Login Script VendorPHPJabbers Affected 3.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53878
- 2026-10-03 Alias added: GHSA-3855-8298-m4gc
References
Exploit 1
Other 1
More PHPJabbers vulnerabilities
- TI-2024-37889 An SQL injection vulnerability in the pjActionGetUser function of PHPJabbers Cinema… CVSS 3.1CRITICAL 9.8
- TI-2023-21538 User enumeration is found in in PHPJabbers Ticket Support Script v3.2. CVSS 3.1CRITICAL 9.8
- TI-2023-21537 User enumeration is found in PHPJabbers Event Booking Calendar v4.0. CVSS 3.1CRITICAL 9.8
- TI-2023-21536 User enumeration is found in PHP Jabbers Car Rental Script v3.0. CVSS 3.1CRITICAL 9.8
- TI-2023-21535 User enumeration is found in PHPJabbers Taxi Booking Script v2.0. CVSS 3.1CRITICAL 9.8
- TI-2023-21534 User enumeration is found in PHPJabbers Fundraising Script v1.0. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-53878 · CVE Program
- CVE-2023-53878 · NVD
- FIRST EPSS
- GHSA-3855-8298-m4gc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences