CVE-2021-43798 Grafana Labs Grafana: file path flaw
In plain words: The program can be tricked into reading or writing files outside the folder it should stay in. Leaks files such as passwords and settings, or overwrites important ones.
Confirmed exploited by CISA on · US federal patch deadline Oct 30, 2025
What to do
- Install Grafana Labs's security update for Grafana. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Grafana Path Traversal Vulnerability
- Product
- Grafana Labs Grafana
- CISA description
- Grafana contains a path traversal vulnerability that could allow access to local files.
- Type of flaw
- File path flaw (CWE-22)
- Confirmed exploited
- Oct 9, 2025
- US federal patch deadline
- Oct 30, 2025
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Answering about CVE-2021-43798 ·
Questions about CVE-2021-43798
Is CVE-2021-43798 being exploited?
Yes. CISA added CVE-2021-43798 to its Known Exploited Vulnerabilities catalog on Oct 9, 2025, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-43798?
Install Grafana Labs's security update for Grafana. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2021-43798?
Only if you use Grafana Labs Grafana. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.