- 4.0MediumCVSS base score
- 1.0%Exploitation in 30 daysEPSS · top 37% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, any users with the ability to modify any data that could eventually be exported as a CSV file from the `ImportExportController` could potentially introduce a CSV injection into the data to cause the generated CSV export file to be malicious. This requires attackers to achieve the following before a successful attack can be completed: 1. Have found a vulnerability in the victims spreadsheet software of choice. 2. Control data that would potentially be exported through the `ImportExportController` by a theoretical victim. 3. Convince the victim to export above data as a CSV and run it in vulnerable spreadsheet software while also bypassing any sanity checks by said software. Issue has been patched in Build 466 (v1.0.466).
Timeline
ID reserved
By GitHub_M
- 5 months later
· 5 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.1 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L |
- EPSS (exploitation in 30 days)
- 1.0% · top 37% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.0.
Affected products
- affected >= 1.0.319, < 1.0.466
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistoctober/backendGHSA-4rhm-m2fp-hx7q (opens in a new tab)
References
References5
- https://github.com/octobercms/october/security/advisories/GHSA-4rhm-m2fp-hx7q (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/octobercms/library/commit/c84bf03f506052c848f2fddc05f24be631427a1a (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/octobercms/october/commit/802d8c8e09a2b342649393edb6d3ceb958851484 (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html (opens in a new tab)x_refsource_MISCx_transferred
- 20200804 October CMS <= Build 465 Multiple Vulnerabilities - Arbitrary File Read (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-0458 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4rhm-m2fp-hx7q (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-5299)Record last updated .