How severe is CVE-2008-5657?

CVE-2008-5657 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-5657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5657?

CVE-2008-5657 primarily affects Quassel Quassel Core. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5657?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2008-5657 published?

CVE-2008-5657 was published on 2008-12-17 and last updated on 2026-06-16.

CVE-2008-5657

CVE-2008-5657 is a high-severity vulnerability in Quassel Quassel Core with a CVSS 2.0 base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Quassel Quassel Core
Published: 2008-12-17
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2008-5657?: 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 severe is CVE-2008-5657?: CVE-2008-5657 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-5657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5657?: CVE-2008-5657 primarily affects Quassel Quassel Core. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-5657 published?: CVE-2008-5657 was published on 2008-12-17 and last updated on 2026-06-16.

References

Affected products (13)

cpe:2.3:a:quassel:quassel_core:*:*:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:alpha5:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:pre:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.3.0:pre:*:*:*:*:*:*
cpe:2.3:a:quassel:quassel_core:0.3.0.1:*:*:*:*:*:*:*

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →