CVE-2005-4830: CRLF injection vulnerability in viewcvs in ViewCVS 0.9.2 allows remote attackers to inject arbitrary HTTP head

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HIGH 7.6DOWNGRADE

CVE-2005-4830 is a high-severity flaw (CVSS 7.6) affecting viewcvs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CRLF injection vulnerability in viewcvs in ViewCVS 0.9.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the content-type parameter.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.6 (High)
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Published	2005-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: viewcvs

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

Am I affected?

Timeline

2005-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:19 UTCUpdated Record last modified

viewcvs viewcvs DOWNGRADE

Affected: 0.9.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.2

1. Check installed version

apt-cache policy viewcvs || rpm -q viewcvs || viewcvs --version

2. No fixed release: DOWNGRADE to a release before 0.9.2 (Debian / Ubuntu)

apt-cache madison viewcvs sudo apt install viewcvs=<VERSION_BEFORE_0.9.2> sudo apt-mark hold viewcvs

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list viewcvs sudo dnf downgrade viewcvs-<VERSION_BEFORE_0.9.2> sudo dnf versionlock add viewcvs

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2005-4830?

viewcvs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-4830 being exploited?

CVE-2005-4830 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-2005-4830 affect?

CVE-2005-4830 affects viewcvs. Severity is high (CVSS 7.6). CRLF injection vulnerability in viewcvs in ViewCVS 0.9.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the content-type parameter.

How urgent is CVE-2005-4830?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2005-4831 MEDIUM 4.3 DOWNGRADE viewcvs in ViewCVS 0.9.2 allows remote attackers to set the Content-Type header to arbitrary values via the co
CVE-2004-1062 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in ViewCVS 0.9.2 allow remote attackers to inject arbitrar
CVE-2004-0915 MEDIUM 5.0 DOWNGRADE MITIGATE Multiple unknown vulnerabilities in viewcvs before 0.9.2, when exporting a repository as a tar archive, does n
CVE-2002-0771 MEDIUM 6.4 DOWNGRADE Cross-site scripting vulnerability in viewcvs.cgi for ViewCVS 0.9.2 allows remote attackers to inject script a

References

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