CVE-2005-2403
The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2005-2403- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2005-2403- Updated
- 2026-11-02
EUVDEUVD-2005-2404 No score
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.
- Record
EUVD-2005-2404- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4rq5-px86-cv23 No score
The login protocol in RealChat 3.5.1b does not use authentication, which allows remote attackers...
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.
- Record
GHSA-4rq5-px86-cv23- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2005-2403 is a medium vulnerability (CVSS 5.0) in Realchat, published July 27, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.49%, the 74th percentile. No source names a fixed version.