How severe is CVE-2013-6404?

CVE-2013-6404 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2013-6404 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6404?

CVE-2013-6404 primarily affects Quassel-irc Quassel Irc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-6404?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-6404 published?

CVE-2013-6404 was published on 2013-12-09 and last updated on 2026-06-17.

CVE-2013-6404

CVE-2013-6404 is a medium-severity vulnerability in Quassel-irc Quassel Irc with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Quassel-irc Quassel Irc
Published: 2013-12-09
Last modified: 2026-06-17

Description

Quassel core (server daemon) in Quassel IRC before 0.9.2 does not properly verify the user ID when accessing user backlogs, which allows remote authenticated users to read other users' backlogs via the bufferid in (1) 16/select_buffer_by_id.sql, (2) 16/select_buffer_by_id.sql, and (3) 16/select_buffer_by_id.sql in core/SQL/PostgreSQL/.

Frequently asked questions

What is CVE-2013-6404?: Quassel core (server daemon) in Quassel IRC before 0.9.2 does not properly verify the user ID when accessing user backlogs, which allows remote authenticated users to read other users' backlogs via the bufferid in (1) 16/select_buffer_by_id.sql, (2) 16/select_buffer_by_id.sql, and (3) 16/select_buffer_by_id.sql in core/SQL/PostgreSQL/.
How severe is CVE-2013-6404?: CVE-2013-6404 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2013-6404 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6404?: CVE-2013-6404 primarily affects Quassel-irc Quassel Irc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-6404?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6404 published?: CVE-2013-6404 was published on 2013-12-09 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:quassel-irc:quassel_irc:*:*:*:*:*:*:*:*
cpe:2.3:a:quassel-irc:quassel_irc:0.9.0:*:*:*:*:*:*:*

More vulnerabilities in Quassel-irc Quassel Irc

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