CVE-2006-1634: Cross-site scripting (XSS) vulnerability in index.php in LucidCMS 2.0.0 RC4 allows remote attackers to inject

Routine

MEDIUM 4.3DOWNGRADE

CVE-2006-1634 is a medium-severity flaw (CVSS 4.3) affecting lucidcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in index.php in LucidCMS 2.0.0 RC4 allows remote attackers to inject arbitrary web script or HTML via the command parameter.

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	1.7% (top 23%)
CISA exploited list	No
Published	2006-04-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lucidcms

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

Am I affected?

Timeline

2006-04-06 10:04 UTCPublished CVE record published
2026-06-16 22:23 UTCUpdated Record last modified

lucidcms lucidcms DOWNGRADE

Affected: 2.0.0_rc4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.0_rc4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0.0_rc4 (Debian / Ubuntu)

apt-cache madison lucidcms sudo apt install lucidcms=<VERSION_BEFORE_2.0.0_rc4> sudo apt-mark hold lucidcms

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

dnf --showduplicates list lucidcms sudo dnf downgrade lucidcms-<VERSION_BEFORE_2.0.0_rc4> sudo dnf versionlock add lucidcms

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: LucidCMS 2.0 - 'index.php' Multiple Cross-Site Scripting Vulnerabilities

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-2006-1634?

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

Is CVE-2006-1634 being exploited?

CVE-2006-1634 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-2006-1634 affect?

CVE-2006-1634 affects lucidcms. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in index.php in LucidCMS 2.0.0 RC4 allows remote attackers to inject arbitrary web script or HTML via the command parameter.

How urgent is CVE-2006-1634?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-1635 MEDIUM 5.0 DOWNGRADE LucidCMS 2.0.0 RC4 allows remote attackers to obtain sensitive information via a direct request to /lucid_phpl
CVE-2005-3130 HIGH 7.5 DOWNGRADE SQL injection vulnerability in lucidCMS 1.0.11 allows remote attackers to execute arbitrary SQL commands via t
CVE-2005-3127 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in index.php in lucidCMS 1.0.11 allows remote attackers to inject arb

References

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