CVE-2023-51006: An issue in the openFile method of Chinese Perpetual Calendar v9.0.0 allows attackers to read any file via uns

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-51006 is a high-severity flaw (CVSS 7.5) affecting chinese perpetual calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in the openFile method of Chinese Perpetual Calendar v9.0.0 allows attackers to read any file via unspecified vectors.

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	0.6% (top 52%)
CISA exploited list	No
Published	2023-12-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zhwnl

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

Am I affected?

Timeline

2023-12-28 04:15 UTCPublished CVE record published
2026-06-17 06:40 UTCUpdated Record last modified

zhwnl chinese perpetual calendar DOWNGRADE

Affected: 9.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy chinese-perpetual-calendar || rpm -q chinese-perpetual-calendar || chinese-perpetual-calendar --version

2. No fixed release: DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison chinese-perpetual-calendar sudo apt install chinese-perpetual-calendar=<VERSION_BEFORE_9.0.0> sudo apt-mark hold chinese-perpetual-calendar

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

dnf --showduplicates list chinese-perpetual-calendar sudo dnf downgrade chinese-perpetual-calendar-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add chinese-perpetual-calendar

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-2023-51006?

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

Is CVE-2023-51006 being exploited?

CVE-2023-51006 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-2023-51006 affect?

CVE-2023-51006 affects chinese perpetual calendar. Severity is high (CVSS 7.5). An issue in the openFile method of Chinese Perpetual Calendar v9.0.0 allows attackers to read any file via unspecified vectors.

How urgent is CVE-2023-51006?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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