CVE-2024-52875: An issue was discovered in GFI Kerio Control 9.2.5 through 9.4.5

This week

HIGH 8.8UPGRADE

CVE-2024-52875 is a high-severity flaw (CVSS 8.8) affecting kerio control. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in GFI Kerio Control 9.2.5 through 9.4.5. The dest GET parameter passed to the /nonauth/addCertException.cs and /nonauth/guestConfirm.cs and /nonauth/expiration.cs pages is not properly sanitized before being used to generate a Location HTTP header in a 302 HTTP response. This can be exploited to perform Open Redirect or HTTP Response Splitting attacks, which in turn lead to Reflected Cross-Site Scripting (XSS). Remote com

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	29.6% (top 2%)
CISA exploited list	No
Weakness	CWE-113
Published	2025-01-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gfi

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-01-31 08:15 UTCPublished CVE record published
2026-06-17 08:07 UTCUpdated Record last modified

gfi kerio control UPGRADE

Affected: >= 9.2.5 and <= 9.4.5

Fixed in: newer than 9.4.5

Safe to downgrade to: a release before 9.2.5

1. Check installed version

apt-cache policy kerio-control || rpm -q kerio-control || kerio-control --version

2. UPGRADE to newer than 9.4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kerio-control

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kerio-control

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.2.5 (Debian / Ubuntu)

apt-cache madison kerio-control sudo apt install kerio-control=<VERSION_BEFORE_9.2.5> sudo apt-mark hold kerio-control

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kerio-control sudo dnf downgrade kerio-control-<VERSION_BEFORE_9.2.5> sudo dnf versionlock add kerio-control

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.

Nuclei scan template: Kerio Control v9.2.5 - CRLF Injection

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-2024-52875?

kerio control: upgrade to newer than 9.4.5. Exact commands for each OS are on this page.

Is CVE-2024-52875 being exploited?

CVE-2024-52875 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-2024-52875 affect?

CVE-2024-52875 affects kerio control. Severity is high (CVSS 8.8). An issue was discovered in GFI Kerio Control 9.2.5 through 9.4.5. The dest GET parameter passed to the /nonauth/addCertException.cs and /nonauth/guestConfirm.cs and /nonauth/expiration.cs pages is not properly sanitized before being used to

How urgent is CVE-2024-52875?

Priority 60/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2025-34071 CRITICAL 9.8 DOWNGRADE A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access t
CVE-2025-34070 CRITICAL 9.8 DOWNGRADE A missing authentication vulnerability in the GFIAgent component of GFI Kerio Control 9.4.5 allows unauthentic
CVE-2025-34069 CRITICAL 9.8 DOWNGRADE An authentication bypass vulnerability exists in GFI Kerio Control 9.4.5 due to insecure default proxy configu

References

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