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CVE-2013-6404

14
FAUCET Score

CVE-2013-6404 describes an improper authorization vulnerability in Quassel IRC core versions prior to 0.9.2. This flaw allows authenticated attackers to access other users' chat backlogs by manipulating the buffer ID in SQL queries. With a CVSS score of 4.0, this vulnerability has a low severity, requiring network access and authentication to achieve partial confidentiality impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.1CPE matchmatch criteria
cpe:2.3:a:quassel-irc:quassel_irc:*:*:*:*:*:*:*:*
0.9.0CPE matchmatch criteria
cpe:2.3:a:quassel-irc:quassel_irc:0.9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.06%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0206 is in the 91st percentile among its peer group of 21,977 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 0.1 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

lists.opensuse.org / opensuse-updates/2013-12/msg00092.html
lists.opensuse.org / opensuse-updates/2014-01/msg00078.html
osvdb.org / 100432
quassel-irc.org / node/123
PatchVendor Advisory
secunia.com / advisories/55640
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/89377
github.com / quassel/quassel/commit/a1a24da
ExploitPatch
openwall.com / lists/oss-security/2013/11/28/8