CVE-2021-3959 Server-Side Request Forgery in Bitdefender GravityZone Update Server in Relay Mode (VA-10145)
An attacker can proxy requests to the relay server via SSRF in Bitdefender GravityZone Update Server when relay mode is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3959?
CVE-2021-3959 is a medium-severity server-side request forgery vulnerability in Bitdefender GravityZone, published on 16 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Server-Side Request Forgery (SSRF) vulnerability in the EPPUpdateService component of Bitdefender Endpoint Security Tools allows an attacker to proxy requests to the relay server. This issue affects: Bitdefender Bitdefender GravityZone versions prior to 3.3.8.272
Weakness: CWE-918
Which versions are affected by CVE-2021-3959?
It affects 1 product.
Products include Bitdefender Gravityzone.
How do I fix CVE-2021-3959?
No fix has been published for CVE-2021-3959 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2021-3959 being exploited?
There is no known exploitation of CVE-2021-3959 in the wild and no public exploit code.
Other vulnerabilities in Bitdefender GravityZone
- CVE-2017-8931 Privilege escalation in n/a
- CVE-2018-8955 Code injection in n/a
- CVE-2025-2244 Insecure PHP deserialization issue in GravityZone Console (VA-12634)
- CVE-2024-6980 Verbose error handling issue in GravityZone Update Server proxy service
- CVE-2022-2830 Deserialization of Untrusted Data in GravityZone Console On-Premise (VA-10573)
Sources
Also known as GHSA-f622-26hm-xgj8.