Known v1.3.1+2020120201 was discovered to allow attackers to perform an account takeover via a host header injection attack.
https://www.pethuraj.com/blog/how-i-earned-800-for-host-header-injection-vulnerability/
https://github.com/idno/known
https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Account%20Takeover#account-takeover-through-password-reset-poisoning
https://blog.jitendrapatro.me/multiple-vulnerabilities-in-idno-known-php-cms-software/
Source: Mitre, NVD
Published: 2022-07-08
Updated: 2026-06-17
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00127