CVE-2006-0183: Direct static code injection vulnerability in edit.php in ACal Calendar Project 2.2.5 allows authenticated use

This month

MEDIUM 6.5DOWNGRADE

CVE-2006-0183 is a medium-severity flaw (CVSS 6.5) affecting calendar project. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Direct static code injection vulnerability in edit.php in ACal Calendar Project 2.2.5 allows authenticated users to execute arbitrary PHP code via (1) the edit=header value, which modifies header.php, or (2) the edit=footer value, which modifies footer.php. NOTE: this issue might be resultant from the poor authentication as identified by CVE-2006-0182. Since the design of the product allows the administrator to edit the code, perhaps this issue

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Published	2006-01-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: acal

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

Am I affected?

Timeline

2006-01-12 06:02 UTCPublished CVE record published
2026-06-16 22:20 UTCUpdated Record last modified

acal calendar project DOWNGRADE

Affected: 2.2.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.5

1. Check installed version

apt-cache policy calendar-project || rpm -q calendar-project || calendar-project --version

2. No fixed release: DOWNGRADE to a release before 2.2.5 (Debian / Ubuntu)

apt-cache madison calendar-project sudo apt install calendar-project=<VERSION_BEFORE_2.2.5> sudo apt-mark hold calendar-project

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

dnf --showduplicates list calendar-project sudo dnf downgrade calendar-project-<VERSION_BEFORE_2.2.5> sudo dnf versionlock add calendar-project

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-2006-0183?

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

Is CVE-2006-0183 being exploited?

CVE-2006-0183 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-2006-0183 affect?

CVE-2006-0183 affects calendar project. Severity is medium (CVSS 6.5). Direct static code injection vulnerability in edit.php in ACal Calendar Project 2.2.5 allows authenticated users to execute arbitrary PHP code via (1) the edit=header value, which modifies header.php, or (2) the edit=footer value, which mod

How urgent is CVE-2006-0183?

Priority 40/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-0182 HIGH 7.5 DOWNGRADE login.php in ACal Calendar Project 2.2.5 allows remote attackers to bypass authentication by setting the ACalA

References

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