October CMS CSRF

published 2017-11-01 9 y ago modified 2026-06-17 4 mo ago also GHSA-vm6r-4p4v-232x , EUVD-2022-5379

cvss: 8.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 1; Exploit-DB

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.

Patch / fix

fixed in 1 links 1

packagist october/october 1.0.427

github.com/octobercms/october@4a6e0e1 commit

Timeline

2017-11-01 First public exploit (EDB-43106)
2017-11-01 Published

Exploit prediction

1.98% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-43106 OctoberCMS 1.0.426 (Build 426) - Cross-Site Request Forgery webapps, 2017-11-01

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	october/october	<1.0.427	1.0.427

Classification

Weakness

CWE-352 Cross-Site Request Forgery

References

github.com /octobercms/october/commit/4a6e0e1e0e2c3facebc17e0db38c5b4d4cb05bd0
web, patch, third-party-advisory
exploit-db.com /exploits/43106/
exploit, third-party-advisory, vdb-entry
nvd.nist.gov /vuln/detail/CVE-2017-16244
advisory
github.com /octobercms/october
package
exploit-db.com /exploits/43106
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary