CVE-2021-29487

Authentication bypass in Octobercms

HIGH
7.4
CVSS Score
Published: August 26, 2021 at 07:00 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
1 product affected across 1 vendorOctober

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Severity
HIGH7.4
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.0.472v < 1.1.51.0.471 ≤ v < 1.0.4721.1.1 ≤ v < 1.1.5
Affected range stops below 1.0.472, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.1.5, so it looks safe — our inference, not a vendor statement

CVSS

7.4HIGHGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287NVD-CWE-Other

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