CVE-2007-4240: The check_logout function in class/auth.php in Help Center Live (hcl) 2.1.3a sends a redirect to the web brows

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HIGH 7.5DOWNGRADE

CVE-2007-4240 is a high-severity flaw (CVSS 7.5) affecting help center live. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The check_logout function in class/auth.php in Help Center Live (hcl) 2.1.3a sends a redirect to the web browser but does not exit when administrative credentials are missing, which allows remote attackers to delete administrative users and have other unspecified impact via certain requests to (1) admin/departments.php, (2) admin/operators.php, and other unspecified scripts. NOTE: some of these details are obtained from third party information.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Published	2007-08-08
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: help center live

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

Am I affected?

Timeline

2007-08-08 22:17 UTCPublished CVE record published
2026-06-16 22:43 UTCUpdated Record last modified

help center live help center live DOWNGRADE

Affected: 2.1.3a

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.3a

1. Check installed version

apt-cache policy help-center-live || rpm -q help-center-live || help-center-live --version

2. No fixed release: DOWNGRADE to a release before 2.1.3a (Debian / Ubuntu)

apt-cache madison help-center-live sudo apt install help-center-live=<VERSION_BEFORE_2.1.3a> sudo apt-mark hold help-center-live

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

dnf --showduplicates list help-center-live sudo dnf downgrade help-center-live-<VERSION_BEFORE_2.1.3a> sudo dnf versionlock add help-center-live

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-2007-4240?

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

Is CVE-2007-4240 being exploited?

CVE-2007-4240 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-2007-4240 affect?

CVE-2007-4240 affects help center live. Severity is high (CVSS 7.5). The check_logout function in class/auth.php in Help Center Live (hcl) 2.1.3a sends a redirect to the web browser but does not exit when administrative credentials are missing, which allows remote attackers to delete administrative users and

How urgent is CVE-2007-4240?

Priority 44/100. High severity

Software pages

PHP vulnerabilities

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References

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