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CVE-2005-2403

15
FAUCET Score

CVE-2005-2403 describes an authentication bypass vulnerability in RealChat 3.5.1b. The login protocol lacks proper authentication, allowing remote attackers to impersonate other users by sniffing and replaying chat session beginnings with a modified username. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and potential for partial integrity impact. There is no evidence of active exploitation, nor are there known Metasploit, Nuclei, or ExploitDB modules available. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.1bCPE matchmatch criteria
cpe:2.3:a:realchat:realchat:3.5.1b:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 54th percentile among its peer group of 23,690 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

seclists.org / lists/bugtraq/2005/Jul/0403.html
ExploitVendor Advisory
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/21497
securityfocus.com / bid/14358