Web cache poisoning via unvalidated Host header
Published Jan 22, 2025 · Updated Jan 14, 2026
Host header injection in affected Fortinet product GUIs allows remote attackers to poison intermediary web caches with crafted requests. The GUI accepts an attacker-controlled Host value that points generated references toward an arbitrary web server instead of constraining the authority. No authentication is required, but exploitation requires an intermediary cache and user interaction; the bounded result is poisoned content rather than service interruption.
Summary
What happened
Host header injection in affected Fortinet product GUIs allows remote attackers to poison intermediary web caches with crafted requests. The GUI accepts an attacker-controlled Host value that points generated references toward an arbitrary web server instead of constraining the authority. No authentication is required, but exploitation requires an intermediary cache and user interaction; the bounded result is poisoned content rather than service interruption.
The record
- CVE
- CVE-2022-23439
- Published
- Jan 22, 2025
- Updated
- Jan 14, 2026
- Vendor
- Fortinet
- Product
- FortiManager
- Classifications
- CWE-610, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 22, 2025CVE publishedPublication date reported by the CVE source.
- Jan 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.2.0 <=6.2.13
- Affected versionversion=6.4.0 <=6.4.15
- Affected versionversion=7.0.0 <=7.0.15
- Affected versionversion=7.2.0 <=7.2.11
- Affected versionversion=7.4.0 <=7.4.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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