Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites with user accounts (unless Kirby's API and Panel are disabled in the config). It can only be abused if a Kirby user is logged in on a device or browser that is shared with potentially untrusted users or if an attacker already maliciously used a previous password to log in to a Kirby site as the affected user. Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization. In the variation described in this advisory, it allows attackers to stay logged in to a Kirby site on another device even if the logged in user has since changed their password. Kirby did not invalidate user sessions that were created with a password that was since changed by the user or by a site admin. If a user changed their password to lock out an attacker who was already in possession of the previous password or of a login session on another device or browser, the attacker would not be reliably prevented from accessing the Kirby site as the affected user. The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of the mentioned releases, the maintainers have updated the authentication implementation to keep track of the hashed password in each active session. If the password changed since the login, the session is invalidated. To enforce this fix even if the vulnerability was previously abused, all users are logged out from the Kirby site after updating to one of the patched releases.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2,
    3.8.4.1, and 3.9.6 affects all Kirby sites with user accounts (unless Kirby's API and Panel are disabled
    in the config). It can only be abused if a Kirby user is logged in on a device or browser that is shared
    with potentially untrusted users or if an attacker already maliciously used a previous password to log in
    to a Kirby site as the affected user. Insufficient Session Expiration is when a web site permits an
    attacker to reuse old session credentials or session IDs for authorization. In the variation described in
    this advisory, it allows attackers to stay logged in to a Kirby site on another device even if the logged
    in user has since changed their password. Kirby did not invalidate user sessions that were created with a
    password that was since changed by the user or by a site admin. If a user changed their password to lock
    out an attacker who was already in possession of the previous password or of a login session on another
    device or browser, the attacker would not be reliably prevented from accessing the Kirby site as the
    affected user. The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all
    of the mentioned releases, the maintainers have updated the authentication implementation to keep track of
    the hashed password in each active session. If the password changed since the login, the session is
    invalidated. To enforce this fix even if the vulnerability was previously abused, all users are logged out
    from the Kirby site after updating to one of the patched releases. (CVE-2023-38489)

ID	Name	Product	Family	Type	Severity
410933	SCA: security update for getkirby/cms (GHSA-5mvj-rvp8-rf45)	Tenable Cloud Security	SCA Checks	Local	high
410933	SCA: security update for getkirby/cms (GHSA-5mvj-rvp8-rf45)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2023-38489

high

Tenable Plugins

high

high