CVE-2009-1809: Multiple cross-site scripting (XSS) vulnerabilities in myColex 1.4.2 allow remote attackers to inject arbitrar

Routine

MEDIUM 4.3DOWNGRADE

CVE-2009-1809 is a medium-severity flaw (CVSS 4.3) affecting mycolex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in myColex 1.4.2 allow remote attackers to inject arbitrary web script or HTML via (1) the year parameter to modules/kalender.php, (2) the Page parameter in a List action to modules/ereignis.php, (3) the Kontext parameter in a Search action to modules/kategorie.php, or (4) the image parameter to modules/image.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-79
Published	2009-05-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: collector

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

Am I affected?

Timeline

2009-05-29 16:30 UTCPublished CVE record published
2026-06-16 23:08 UTCUpdated Record last modified

collector mycolex DOWNGRADE

Affected: 1.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.2 (Debian / Ubuntu)

apt-cache madison mycolex sudo apt install mycolex=<VERSION_BEFORE_1.4.2> sudo apt-mark hold mycolex

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

dnf --showduplicates list mycolex sudo dnf downgrade mycolex-<VERSION_BEFORE_1.4.2> sudo dnf versionlock add mycolex

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: my-colex 1.4.2 - Authentication Bypass / SQL Injection / Cross-Site Scripting

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-2009-1809?

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

Is CVE-2009-1809 being exploited?

CVE-2009-1809 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-2009-1809 affect?

CVE-2009-1809 affects mycolex. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in myColex 1.4.2 allow remote attackers to inject arbitrary web script or HTML via (1) the year parameter to modules/kalender.php, (2) the Page parameter in a List action to modules/ereign

How urgent is CVE-2009-1809?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2009-1825 MEDIUM 4.0 DOWNGRADE modules/admuser.php in myColex 1.4.2 does not require administrative authentication, which allows remote authe
CVE-2009-1810 MEDIUM 6.0 DOWNGRADE Multiple SQL injection vulnerabilities in myColex 1.4.2 allow remote attackers to execute arbitrary SQL comman

References

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