CVE-2006-4963: Directory traversal vulnerability in index.php in Exponent CMS 0.96.3 allows remote attackers to read and exec

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MEDIUM 6.4DOWNGRADE

CVE-2006-4963 is a medium-severity flaw (CVSS 6.4) affecting exponent cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in index.php in Exponent CMS 0.96.3 allows remote attackers to read and execute arbitrary local files via a .. (dot dot) sequence in the view parameter in the show_view action in the calendarmodule module, as demonstrated by executing PHP code through session files.

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	7.1% (top 6%)
CISA exploited list	No
Published	2006-09-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: exponent

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

Am I affected?

Timeline

2006-09-23 10:07 UTCPublished CVE record published
2026-06-16 22:30 UTCUpdated Record last modified

exponent exponent cms DOWNGRADE

Affected: 0.96.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.96.3

1. Check installed version

apt-cache policy exponent-cms || rpm -q exponent-cms || exponent-cms --version

2. No fixed release: DOWNGRADE to a release before 0.96.3 (Debian / Ubuntu)

apt-cache madison exponent-cms sudo apt install exponent-cms=<VERSION_BEFORE_0.96.3> sudo apt-mark hold exponent-cms

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

dnf --showduplicates list exponent-cms sudo dnf downgrade exponent-cms-<VERSION_BEFORE_0.96.3> sudo dnf versionlock add exponent-cms

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: Exponent CMS 0.96.3 - 'view' Remote Command 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-2006-4963?

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

Is CVE-2006-4963 being exploited?

CVE-2006-4963 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-2006-4963 affect?

CVE-2006-4963 affects exponent cms. Severity is medium (CVSS 6.4). Directory traversal vulnerability in index.php in Exponent CMS 0.96.3 allows remote attackers to read and execute arbitrary local files via a .. (dot dot) sequence in the view parameter in the show_view action in the calendarmodule module,

How urgent is CVE-2006-4963?

Priority 51/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

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References

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