October CMS CSRF
Cross-Site Request Forgery exists in OctoberCMS 1.0.426 (aka Build 426) due to improper validation of CSRF tokens for postback handling, allowing an attacker to successfully take over the victim's account. The attack bypasses a protection mechanism involving X-CSRF headers and CSRF tokens via a certain _handler postback variable.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | october/october | < 1.0.427 | 1.0.427 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-352- Platform
- Composer
- Package
october/october- Disclosed
- 13.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vm6r-4p4v-232x - CC BY 4.0
Vulnerability history: october/october
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 13
- First → latest
- 06.2020 09.2026
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 4
- Medium 5
- Low 3
Disclosures per year
- 2020: 1
- 2021: 1
- 2022: 5
- 2023: 1
- 2024: 2
- 2025: 1
- 2026: 2
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