Auth bypass in Octobercms October
CVE-2021-29487
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Octobercms October — versions >= 1.0.471, < 1.0.472, >= 1.1.1, < 1.1.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374 (Patch, Third Party Advisory)
- github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9 (Patch, Third Party Advisory)
- github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29487?
- CVE-2021-29487 is a high-severity vulnerability in Octobercms October, classified under Improper Authentication. CVSS score: 7.4/10. Published 2021-08-26.
- How severe is CVE-2021-29487?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2021-29487 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.