CVE-2006-0206: Eval injection vulnerability in Light Weight Calendar (LWC) 1.0 (20040909) and earlier allows remote attackers

This month

HIGH 7.5DOWNGRADE

CVE-2006-0206 is a high-severity flaw (CVSS 7.5) affecting light weight calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Eval injection vulnerability in Light Weight Calendar (LWC) 1.0 (20040909) and earlier allows remote attackers to execute arbitrary PHP code via the date parameter in cal.php, which is included by index.php.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Published	2006-01-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: light weight calendar

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

Am I affected?

Timeline

2006-01-13 23:03 UTCPublished CVE record published
2026-06-16 22:20 UTCUpdated Record last modified

light weight calendar light weight calendar DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy light-weight-calendar || rpm -q light-weight-calendar || light-weight-calendar --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison light-weight-calendar sudo apt install light-weight-calendar=<VERSION_BEFORE_1.0> sudo apt-mark hold light-weight-calendar

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

dnf --showduplicates list light-weight-calendar sudo dnf downgrade light-weight-calendar-<VERSION_BEFORE_1.0> sudo dnf versionlock add light-weight-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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Light Weight Calendar 1.x - 'date' Remote Code Execution

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-2006-0206?

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

Is CVE-2006-0206 being exploited?

CVE-2006-0206 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-2006-0206 affect?

CVE-2006-0206 affects light weight calendar. Severity is high (CVSS 7.5). Eval injection vulnerability in Light Weight Calendar (LWC) 1.0 (20040909) and earlier allows remote attackers to execute arbitrary PHP code via the date parameter in cal.php, which is included by index.php.

How urgent is CVE-2006-0206?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-1252 HIGH 7.5 DOWNGRADE Eval injection vulnerability in cal.php in Light Weight Calendar (LWC) 1.0 allows remote attackers to execute

References

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