CVE-2021-29487 Authentication bypass in Octobercms
Attackers can bypass authentication and take over user accounts if they possess the Laravel secret key, requiring a patch to October CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-29487?
CVE-2021-29487 is a high-severity authentication bypass vulnerability in Octobercms October, published on 26 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
octobercms in a CMS platform based on the Laravel PHP Framework. In affected versions of the october/system package an attacker can exploit this vulnerability to bypass authentication and takeover of and user account on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. This only affects frontend users and the attacker must obtain a Laravel secret key for cookie encryption and signing in order to exploit this vulnerability. The issue has been patched in Build 472 and v1.1.5.
Weakness: CWE-287
Which versions are affected by CVE-2021-29487?
4 open source packages ship an affected version, including october/system. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
october/system Packagist | All versions | 1.0.472 |
october/system Packagist | All versions | 1.0.472 |
october/system Packagist | From 1.1.1 | 1.1.5 |
october/system Packagist | From 1.1.1 | 1.1.5 |
Products include Octobercms October.
How do I fix CVE-2021-29487?
Upgrade october/system to a fixed version for your release line: 1.0.472 or 1.1.5.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-29487 being exploited?
There is no known exploitation of CVE-2021-29487 in the wild and no public exploit code.
Other vulnerabilities in Octobercms October
Sources
Also known as GHSA-h76r-vgf3-j6w5.