CVE-2025-57403: Cola Dnslog v1.3.2 is vulnerable to Directory Traversal

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2025-57403 is a high-severity flaw (CVSS 7.5) affecting cola dnslog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cola Dnslog v1.3.2 is vulnerable to Directory Traversal. When a DNS query for a TXT record is processed, the application concatenates the requested URL (or a portion of it) directly with a base path using os.path.join. This bypass allows directory traversal or absolute path injection, leading to the potential exposure of sensitive information.

Why this priority

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

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-23
Published	2025-12-26
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: abelche

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-26 16:15 UTCPublished CVE record published
2026-10-13 09:10 UTCUpdated Record last modified

abelche cola dnslog DOWNGRADE

Affected: 1.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.2

1. Check installed version

apt-cache policy cola-dnslog || rpm -q cola-dnslog || cola-dnslog --version

2. No fixed release: DOWNGRADE to a release before 1.3.2 (Debian / Ubuntu)

apt-cache madison cola-dnslog sudo apt install cola-dnslog=<VERSION_BEFORE_1.3.2> sudo apt-mark hold cola-dnslog

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

dnf --showduplicates list cola-dnslog sudo dnf downgrade cola-dnslog-<VERSION_BEFORE_1.3.2> sudo dnf versionlock add cola-dnslog

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-2025-57403?

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

Is CVE-2025-57403 being exploited?

CVE-2025-57403 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-2025-57403 affect?

CVE-2025-57403 affects cola dnslog. Severity is high (CVSS 7.5). Cola Dnslog v1.3.2 is vulnerable to Directory Traversal. When a DNS query for a TXT record is processed, the application concatenates the requested URL (or a portion of it) directly with a base path using os.path.join. This bypass allows di

How urgent is CVE-2025-57403?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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