CVE-2008-5657: CRLF injection vulnerability in Quassel Core before 0.3.0.3 allows remote attackers to spoof IRC messages as o

Q: How do I fix CVE-2008-5657?

quassel core: upgrade to newer than 0.3.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2008-5657 being exploited?

CVE-2008-5657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2008-5657 affect?

CVE-2008-5657 affects quassel core. Severity is high (CVSS 7.5). CRLF injection vulnerability in Quassel Core before 0.3.0.3 allows remote attackers to spoof IRC messages as other users via a crafted CTCP message.

This month

HIGH 7.5UPGRADE

CVE-2008-5657 is a high-severity flaw (CVSS 7.5) affecting quassel core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CRLF injection vulnerability in Quassel Core before 0.3.0.3 allows remote attackers to spoof IRC messages as other users via a crafted CTCP message.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-20
Published	2008-12-17
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: quassel

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2008-12-17 20:30 UTCPublished CVE record published
2026-06-16 23:00 UTCUpdated Record last modified

quassel quassel core UPGRADE

Affected: <= 0.3.0.2 · 0.1.0 · 0.2.0 alpha1 · 0.2.0 alpha2 · 0.2.0 alpha3 · 0.2.0 alpha4 · 0.2.0 alpha5 · 0.2.0 beta1

Fixed in: newer than 0.3.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy quassel-core || rpm -q quassel-core || quassel-core --version

2. UPGRADE to newer than 0.3.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade quassel-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quassel-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2008-5657?

quassel core: upgrade to newer than 0.3.0.2. Exact commands for each OS are on this page.

Is CVE-2008-5657 being exploited?

CVE-2008-5657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2008-5657 affect?

CVE-2008-5657 affects quassel core. Severity is high (CVSS 7.5). CRLF injection vulnerability in Quassel Core before 0.3.0.3 allows remote attackers to spoof IRC messages as other users via a crafted CTCP message.

How urgent is CVE-2008-5657?

Priority 47/100. High severity

References

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