CVE-2025-54141: ViewVC is a browser interface for CVS and Subversion version control repositories

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HIGH 7.5REMOTEUPGRADE

CVE-2025-54141 is a high-severity flaw (CVSS 7.5) affecting viewvc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ViewVC is a browser interface for CVS and Subversion version control repositories. In versions 1.1.0 through 1.1.31 and 1.2.0 through 1.2.3, the standalone.py script provided in the ViewVC distribution can expose the contents of the host server's filesystem though a directory traversal-style attack. This is fixed in versions 1.1.31 and 1.2.4.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-22, CWE-79
Published	2025-07-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: viewvc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-22 22:15 UTCPublished CVE record published
2026-06-17 09:39 UTCUpdated Record last modified

viewvc viewvc UPGRADE

Affected: >= 1.1.0 and < 1.1.31 · >= 1.2.0 and < 1.2.4

Fixed in: 1.1.31, 1.2.4

Safe to downgrade to: a release before 1.1.0

1. Check installed version

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

2. UPGRADE to 1.1.31 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade viewvc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade viewvc

Note

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

3. If no update is available yet, DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison viewvc sudo apt install viewvc=<VERSION_BEFORE_1.1.0> sudo apt-mark hold viewvc

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list viewvc sudo dnf downgrade viewvc-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add viewvc

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.

Advisories and coverage

Research and news

Vulners Bulletins: CVE-2025-54141 2026-10-29

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-2025-54141?

viewvc: upgrade to 1.1.31, 1.2.4. Exact commands for each OS are on this page.

Is CVE-2025-54141 being exploited?

CVE-2025-54141 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-2025-54141 affect?

CVE-2025-54141 affects viewvc. Severity is high (CVSS 7.5). ViewVC is a browser interface for CVS and Subversion version control repositories. In versions 1.1.0 through 1.1.31 and 1.2.0 through 1.2.3, the standalone.py script provided in the ViewVC distribution can expose the contents of the host se

How urgent is CVE-2025-54141?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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