CVE-2020-5299 Potential CSV Injection vector in OctoberCMS
Attackers can inject malicious formulas into CSV exports, potentially executing code if victims open the file in vulnerable spreadsheet software.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-5299?
CVE-2020-5299 is a medium-severity code injection vulnerability in Octobercms October, published on 3 Jun 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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).
Weakness: CWE-77
Which versions are affected by CVE-2020-5299?
2 open source packages ship an affected version, including october/backend. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
october/backend Packagist | From 1.0.319 | 1.0.466 |
october/backend Packagist | From 1.0.319 | 1.0.466 |
Products include Octobercms October.
How do I fix CVE-2020-5299?
Upgrade october/backend to 1.0.466 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2020-5299 being exploited?
There is no known exploitation of CVE-2020-5299 in the wild and no public exploit code.
Other vulnerabilities in Octobercms October
Sources
Also known as GHSA-4rhm-m2fp-hx7q.