CVE-2020-5299

Name: CVE-2020-5299
Creator: NVD / NIST
Published: 2020-06-03T22:15:11.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 1.00%

Last modified Jun 17, 2026

CVE-2020-5299 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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. EPSS estimates a 1.00% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1

5.1/10

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L

EPSS Probability

1.00%

58.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Octobercms	October	>= 1.0.319, < 1.0.466

References

http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Aug/2Mailing List, Third Party Advisory
https://github.com/octobercms/library/commit/c84bf03f506052c848f2fddc05f24be631427a1aPatch, Third Party Advisory
https://github.com/octobercms/october/commit/802d8c8e09a2b342649393edb6d3ceb958851484Patch, Third Party Advisory
https://github.com/octobercms/october/security/advisories/GHSA-4rhm-m2fp-hx7qPatch, Third Party Advisory
http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Aug/2Mailing List, Third Party Advisory
https://github.com/octobercms/library/commit/c84bf03f506052c848f2fddc05f24be631427a1aPatch, Third Party Advisory
https://github.com/octobercms/october/commit/802d8c8e09a2b342649393edb6d3ceb958851484Patch, Third Party Advisory
https://github.com/octobercms/october/security/advisories/GHSA-4rhm-m2fp-hx7qPatch, Third Party Advisory

Timeline

Published: Jun 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5299?

How severe is CVE-2020-5299?

CVE-2020-5299 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 1.00% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5299?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5299?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST