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0 CVE-2023-53878 is a high-severity HTTP request smuggling vulnerability in Phpjabbers Member Login Script version 3.3. It arises from inconsistent parsing of the Content-Length header, allowing attackers to craft malicious POST requests that desynchronize client-server HTTP request handling. This can enable attackers to bypass server-side request processing controls, potentially leading to unauthorized actions or data exposure. The vulnerability requires no authentication or user interaction and can be exploited remotely over the network. Although no known exploits are currently reported in the wild, the vulnerability's nature and CVSS score of 7.3 indicate a significant risk. European organizations using this script, especially those in sectors relying on web-based member authentication, could face targeted attacks. Mitigation involves applying patches once available, implementing strict HTTP header validation, and deploying web application firewalls with request smuggling detection capabilities. Countries with higher adoption of Phpjabbers products and critical web infrastructure are at greater risk. Join the discussion | CVE Database V5 | 12/15/2025, 20:28:18 UTC Added: 12/15/2025, 20:45:20 UTC |
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