Authenticated browser script execution via reflected request data
Published Jul 14, 2026 · Updated Jul 14, 2026
Reflected XSS in Fortinet FortiOS, FortiPAM, and FortiProxy allows remote authenticated users to execute script via crafted requests. Agentless SSL-VPN reflects attacker-controlled request data into a web response without context-appropriate output encoding; no parameter or handler is publicly identified. The attacker must reach that component, and another user must interact with the response; execution is confined to the victim's browser context.
Summary
What happened
Reflected XSS in Fortinet FortiOS, FortiPAM, and FortiProxy allows remote authenticated users to execute script via crafted requests. Agentless SSL-VPN reflects attacker-controlled request data into a web response without context-appropriate output encoding; no parameter or handler is publicly identified. The attacker must reach that component, and another user must interact with the response; execution is confined to the victim's browser context.
The record
- CVE
- CVE-2026-23573
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Fortinet
- Product
- FortiOS
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 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=6.4.0 <=6.4.16
- Affected versionversion=7.0.0 <=7.0.19
- Affected versionversion=7.2.0 <=7.2.13
- Affected versionversion=7.4.0 <=7.4.12
- Affected versionversion=7.6.0 <=7.6.6
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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