CVE-2021-43515 is a high-severity (CVSS 7.8) CWE-1236 vulnerability in kevinpapst/kimai2. A fix is available for kevinpapst/kimai2 — see the affected versions and patch details below.
Improper Neutralization of Formula Elements in a CSV File in Kimai 2
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
kevinpapst/kimai2Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
CSV Injection (aka Excel Macro Injection or Formula Injection) exists in creating new timesheet in Kimai. By filling the Description field with malicious payload, it will be mistreated while exporting to a CSV file.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | kevinpapst/kimai2 | all versions | 1.14.1composer require kevinpapst/kimai2:^1.14.1 |
Affected Products
kimaikimaiDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for kevinpapst/kimai2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update kevinpapst/kimai2 to 1.14.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-43515 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2021-43515 in your dependencies?
Find it across Packagist, including transitive dependencies.