Cyber Resilience

CVE-2024-52875

Gfi Kerio Control 9.2.5 – 9.4.5

Public PoC
Published
31 January 2025
Modified
16 September 2025
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.30 98th percentile
Risk Priority 90 floored blend · peak EPSS

Summary

CVE-2024-52875 is a high-severity HTTP Request/Response Splitting (CWE-113) vulnerability in Gfi Kerio Control. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Content Injection (T1659); ranked in the top 2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and SI-15 (Information Output Filtering) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2024-52875 affects GFI Kerio Control versions 9.2.5 through 9.4.5. The vulnerability stems from improper sanitization of the dest GET parameter supplied to the /nonauth/addCertException.cs, /nonauth/guestConfirm.cs, and /nonauth/expiration.cs endpoints. This parameter is directly incorporated into a Location header within a 302 response, enabling Open Redirect and HTTP Response Splitting attacks that escalate to reflected cross-site scripting; the same flaw can be chained with the product's admin upgrade mechanism to achieve remote command execution.

An unauthenticated remote attacker can supply a crafted dest value to trigger the redirect or header injection. Successful exploitation yields reflected XSS in the context of a victim's browser, which can be leveraged to access the authenticated admin interface and invoke the upgrade feature for arbitrary command execution on the appliance. The issue carries a CVSS 3.1 score of 8.8, reflecting network attack vector, low complexity, no required privileges, and required user interaction.

Public disclosure occurred via a Full Disclosure mailing-list post and a detailed technical write-up at karmainsecurity.com. The EPSS score currently stands at 0.7857 with a recorded peak of 0.8242, indicating sustained exploitation interest following publication. No official patch or mitigation guidance is referenced in the available advisories.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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…

more

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 command execution can be achieved by leveraging the upgrade feature in the admin interface.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1659 Content Injection Initial Access
Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-34071Same product: Gfi Kerio Control
CVE-2025-34070Same product: Gfi Kerio Control
CVE-2025-34069Same product: Gfi Kerio Control
CVE-2025-0825Shared CWE-113
CVE-2026-39971Shared CWE-113
CVE-2026-34519Shared CWE-113
CVE-2026-7010Shared CWE-113
CVE-2026-27810Shared CWE-113
CVE-2026-63771Shared CWE-113
CVE-2026-38978Shared CWE-113

Affected Assets

gfi
kerio control
9.2.5 — 9.4.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V3.4.2
  • V4.1.3
  • V1.3.6
  • V4.2.3

Mitigating Controls (NIST 800-53 r5) AI

Input validation stops unneutralized CR/LF characters from being accepted and later emitted in HTTP headers.

Output filtering can neutralize CRLF sequences before they reach HTTP response headers.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input sanitization and header handling that prevent CRLF injection.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing in development and acceptance can detect CRLF injection flaws before deployment.

prevents

Secure development lifecycle mandates input validation and output encoding that directly prevents CRLF injection into HTTP headers.

prevents

Application security requirements explicitly call for controls against injection flaws including HTTP header manipulation.

prevents

Secure architecture principles reduce the likelihood of header-splitting vulnerabilities through proper component isolation.

prevents

Secure coding standards require neutralization of CRLF sequences before inclusion in HTTP headers.

A.8.15 Logging none match
none

Logging of HTTP traffic can record header-splitting attempts, aiding detection and forensics.

References