CVE-2015-8547

The CoreUserInputHandler::doMode function in core/coreuserinputhandler.cpp in Quassel 0.10.0...

7.5 HighFix available

The CoreUserInputHandler::doMode function in core/coreuserinputhandler.cpp in Quassel 0.10.0 allows remote attackers to cause a denial of service (application crash) via the "/op *" command in a query.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.83%Up 1.5 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2015-8547
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-17
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-8547
Updated: 2026-11-02

EUVDEUVD-2015-8428 No score

Record: EUVD-2015-8428
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3c22-99pq-qjv4 7.5

The CoreUserInputHandler::doMode function in core/coreuserinputhandler.cpp in Quassel 0.10.0...

Record: GHSA-3c22-99pq-qjv4
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 7.5

Record: CVE-2015-8547
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2015-8547 7.5

Record: DEBIAN-CVE-2015-8547
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-8547 7.5

Record: UBUNTU-CVE-2015-8547
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVMGASA-2015-0475 No score

Updated quassel packages fix security vulnerability

The Quassel core could be crashed by a client using the op command, causing a denial of service (CVE-2015-8547).

Record: MGASA-2015-0475
Updated: 2026-11-02

OSVopenSUSE-SU-2024:10119-1 No score

quassel-base-0.12.4-3.3 on GA media

These are all security issues fixed in the quassel-base-0.12.4-3.3 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:10119-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`quassel` Debian:12	before 1:0.12.2-3	1:0.12.2-3
`quassel` Debian:13	before 1:0.12.2-3	1:0.12.2-3
`quassel` Debian:14	before 1:0.12.2-3	1:0.12.2-3
`quassel` Mageia:5	before 0.10.1-5.1.mga5	0.10.1-5.1.mga5
`quassel` Ubuntu:16.04:LTS	All versions, plus listed versions 0.12.2-0ubuntu10.12.2-0ubuntu1.16.04.2	None known
`quassel` openSUSE:Tumbleweed From an advisory covering 3 CVEs	before 0.12.4-3.3	0.12.4-3.3

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-8547 is a high vulnerability (CVSS 7.5) in Quassel-irc Quassel, published December 16, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.83%, the 86th percentile. Fixed in quassel 1:0.12.2-3.

References

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