{"id":"CVE-2005-2403","aliases":["EUVD-2005-2404","GHSA-4rq5-px86-cv23"],"status":"published","title":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers...","description":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers to log on as other users by sniffing the beginning of a chat session and replaying it via a modified username.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01492,"percentile":0.74292,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2005-07-27T04:00:00Z","modified":"2026-06-16T22:14:49Z","products":[{"vendor":"realchat","product":"realchat"}],"references":[{"url":"http://www.securityfocus.com/bid/14358","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://seclists.org/lists/bugtraq/2005/Jul/0403.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Exploit","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/21497","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://securitytracker.com/id?1014562","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2005-2403"},{"url":"https://github.com/advisories/GHSA-4rq5-px86-cv23"}],"sources":{"cve":[{"id":"CVE-2005-2403","description":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers to log on as other users by sniffing the beginning of a chat session and replaying it via a modified username.","status":"published","published":"2005-07-27T04:00:00Z","modified":"2024-08-07T22:22:49.203Z","updated_at":"2026-11-02T14:33:37.840038Z"}],"euvd":[{"id":"EUVD-2005-2404","description":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers to log on as other users by sniffing the beginning of a chat session and replaying it via a modified username.","status":"published","published":"2005-07-27T04:00:00Z","modified":"2024-08-07T22:22:49Z","updated_at":"2026-11-03T01:15:30.973855Z"}],"ghsa":[{"id":"GHSA-4rq5-px86-cv23","title":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers...","description":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers to log on as other users by sniffing the beginning of a chat session and replaying it via a modified username.","status":"published","published":"2022-05-01T02:07:53Z","modified":"2023-01-30T05:07:28Z","updated_at":"2026-11-02T14:47:42.19083Z"}],"nvd":[{"id":"CVE-2005-2403","description":"The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers to log on as other users by sniffing the beginning of a chat session and replaying it via a modified username.","status":"published","published":"2005-07-27T04:00:00Z","modified":"2026-06-16T22:14:49.563Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:56.147496Z"}]}}