Fortinet Fortiauthenticator vulnerabilities

24 CVEs affecting Fortinet Fortiauthenticator, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-53379, published 2026-07-14.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2015-1455, published 2015-02-03. High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days. Fortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL user and (2) www-data for the www-data PostgreSQL user, which makes it easier for remote attackers to obtain…
CVE-2015-1459, published 2015-02-03. Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days. Cross-site scripting (XSS) vulnerability in Fortinet FortiAuthenticator 3.0.0 allows remote attackers to inject arbitrary web script or HTML via the operation parameter to cert/scep/.
CVE-2023-26208, published 2023-03-09. Medium severity, CVSS 5.3. EPSS: 1.8% chance of exploitation in the next 30 days. A improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiAuthenticator 6.4.x and before allows a remote unauthenticated attacker to partially exhaust CPU…
CVE-2015-1456, published 2015-02-03. Medium severity, CVSS 4.0. EPSS: 1.4% chance of exploitation in the next 30 days. Fortinet FortiAuthenticator 3.0.0 logs the PostgreSQL usernames and passwords in cleartext, which allows remote administrators to obtain sensitive information by reading the log at debug/startup/.
CVE-2021-43067, published 2021-12-08. Medium severity, CVSS 6.5. EPSS: 1.1% chance of exploitation in the next 30 days. A exposure of sensitive information to an unauthorized actor in Fortinet FortiAuthenticator version 6.4.0, version 6.3.2 and below, version 6.2.1 and below, version 6.1.2 and below, version 6.0.7 to…
CVE-2013-6990, published 2014-04-30. High severity, CVSS 9.0. EPSS: 1.1% chance of exploitation in the next 30 days. FortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface.
CVE-2021-22124, published 2021-08-04. High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days. An uncontrolled resource consumption (denial of service) vulnerability in the login modules of FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4, and 3.0.0 through 3.0.6; and FortiAuthenticator…
CVE-2018-9186, published 2018-05-31. Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days. A cross-site scripting (XSS) vulnerability in Fortinet FortiAuthenticator in versions 4.0.0 to before 5.3.0 "CSRF validation failure" page allows attacker to execute unauthorized script code via…
CVE-2019-16154, published 2020-01-07. Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days. An improper neutralization of input during web page generation in FortiAuthenticator WEB UI 6.0.0 may allow an unauthenticated user to perform a cross-site scripting attack (XSS) via a parameter of…
CVE-2021-26116, published 2022-04-06. High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days. An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute…

Latest

CVE-2025-53379, published 2026-07-14. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. A out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all versions may allow a remote unauthenticated attacker to retrieve sensitive…
CVE-2026-44277, published 2026-05-12. Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days. A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, FortiAuthenticator 6.5.0 through 6.5.6 may allow…
CVE-2026-21743, published 2026-02-10. High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days. A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions…
CVE-2025-59923, published 2025-12-09. Low severity, CVSS 2.7. EPSS: 0.2% chance of exploitation in the next 30 days. An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all…
CVE-2025-57823, published 2025-12-09. Low severity, CVSS 2.7. EPSS: 0.2% chance of exploitation in the next 30 days. A direct request ('forced browsing') vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3…
CVE-2022-23439, published 2025-01-22. Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days. A externally controlled reference to a resource in another sphere vulnerability in Fortinet allows attacker to poison web caches via crafted HTTP requests, where the `Host` header points to an…
CVE-2024-23664, published 2024-06-03. Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days. A URL redirection to untrusted site ('open redirect') in Fortinet FortiAuthenticator version 6.6.0, version 6.5.3 and below, version 6.4.9 and below may allow an attacker to to redirect users to an…
CVE-2022-22302, published 2023-07-11. Low severity, CVSS 3.3. EPSS: 0.3% chance of exploitation in the next 30 days. A clear text storage of sensitive information (CWE-312) vulnerability in both FortiGate version 6.4.0 through 6.4.1, 6.2.0 through 6.2.9 and 6.0.0 through 6.0.13 and FortiAuthenticator version 5.5.0…
CVE-2022-35850, published 2023-04-11. Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days. An improper neutralization of script-related HTML tags in a web page vulnerability [CWE-80] in FortiAuthenticator versions 6.4.0 through 6.4.4, 6.3.0 through 6.3.3, all versions of 6.2 and 6.1 may…