CVE-2023-38489
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk49th percentile - higher than 49% of all known CVEs
Summary
A vulnerability in the Kirby content management system related to insufficient session expiration affects versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. It allows attackers to remain logged in to a Kirby site even after the user has changed their password.
Risk Assessment
Organizations may be exposed to unauthorized access to user accounts, potentially leading to data breaches or other malicious actions. Attackers can exploit this vulnerability to gain access to a user account that has changed its password.
Recommendation
It is recommended to upgrade to one of the patched versions of Kirby (3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, 3.9.6) and to log out all users after the update to ensure account security.
Other vulnerabilities in Kirby CMS
See all- CVE-2026-45368High
In Kirby CMS versions prior to 4.9.1 and 5.4.1, a vulnerability was found where URL methods for KirbyTags and image blocks components did not filter malicious URL values that resolve to script execution. Attackers can use URL formats like `javascript://x%0A…` to bypass protection against simple `javascript:` URLs and execute scripts.
- CVE-2026-45334Medium
In Kirby CMS versions prior to 4.9.1 and 5.4.1, the content-locking feature exposed user email addresses and identifiers without checking access permissions. A low-privilege authenticated user could learn the email and ID of any user currently editing a model, including administrators.
- CVE-2026-44177High
In Kirby CMS versions 5.3.0 through 5.4.0, a path traversal vulnerability was found due to improper validation of user IDs. An attacker could include arbitrary PHP files named index.php and probe the server's directory structure.
- CVE-2026-44176Medium
In Kirby CMS versions prior to 4.9.1 and 5.4.1, the `pages.access` permission was not checked during page draft rendering. An authenticated attacker with knowledge of the full path to an existing draft could access its frontend preview, leading to disclosure of sensitive information.
- CVE-2026-44175High
Kirby CMS versions prior to 4.9.1 and 5.4.1 do not properly sanitize the list field content on save, allowing XSS attacks. An attacker can bypass the Panel and send malicious HTML directly to the API, which will be executed in visitors' browsers.
- CVE-2026-44174High
Kirby CMS before versions 4.9.1 and 5.4.1 does not validate model attributes used in collection queries, allowing attackers to invoke arbitrary model methods. This can lead to disclosure of sensitive data (e.g., password hashes, filesystem paths) or execution of impactful actions (e.g., privilege escalation, mass deletion of models).
- CVE-2026-54004Medium
In Kirby CMS before versions 4.9.4 and 5.4.4, with content.fileRedirects enabled, unauthenticated clean file URL requests for files in top-level draft pages are redirected to physical media URLs without checking page access permissions or preview tokens, leading to disclosure of draft file contents.
- CVE-2026-54002High
A vulnerability in Kirby CMS before versions 4.9.4 and 5.4.4 allows stored cross-site scripting via malicious markup injected as children of unknown HTML/XML tags. The sanitization functions fail to properly filter such input.
- CVE-2026-50188Medium
A vulnerability in Kirby CMS allows HTTP header injection via newline characters in the header value of the headers option in the Http Remote class. An attacker can inject an unintended header into outgoing requests.
- CVE-2026-49276High
A vulnerability in the Kirby content management system allows a scripting link to be injected as the target of a link in the writer field, enabling self-cross-site scripting (XSS) in the Panel. The issue affects versions prior to 4.9.4 and 5.4.4.
Original NVD description (English source)
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.