Header injection in Web Filter warning page

unknownCVE-2025-62675

CVSSv3 Score: 3.4 An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] in FortiOS and FortiProxy may allow an attacker in possession of a valid web filter override token to inject arbitrary headers via tricking a user into clicking on a crafted link. Revised on 2026-07-14 00:00:00

CSIRTS triage

vendor: Fortinet product: FortiOS, FortiProxyOther

What: An attacker may inject arbitrary headers via tricking a user into clicking on a crafted link.
Who is affected: Users of FortiOS and FortiProxy with web filter override tokens.
Urgency: Remediation is necessary to prevent header injection attacks.
Action: Review and update web filter configurations.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Fortinet FortiGuard PSIRT (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-152

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2025-626750.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-62675	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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