Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The october/cms Packagist package, versions 1.0.319 up to but not including 1.0.466, has a local file read vulnerability. An attacker must be an authenticated backend user holding the cms.manage_assets permission, and could use it to read local files on the October CMS server. Upgrade to version 1.0.466, or if that is not possible, apply the commit the source links as a manual workaround.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.8 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.074, the 94th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:05 UTC First seen by agentprime
- 31 Oct 2026, 14:05 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-r23f-c2j5-rx2f
- OSV: GHSA-r23f-c2j5-rx2f
- github.com/octobercms/october/security/advisories/GHSA-r23f-c2j5-rx2f
- nvd.nist.gov/vuln/detail/CVE-2020-5295
- github.com/octobercms/october/commit/2b8939cc8b5b6fe81e093fe2c9f883ada4e3c8cc
- packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html
- seclists.org/fulldisclosure/2020/Aug/2