7.5

CVE-2021-3959: bitdefender gravityzone Server-Side Request Forgery (SSRF)

CVSS: 7.5v3.1HighModified
Published 16-12-2021Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2021-3959 is a high (CVSS 7.5) Server-Side Request Forgery (SSRF) vulnerability in bitdefender gravityzone. EPSS estimates a 1.74% chance of exploitation in the next 30 days, higher than 77.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.74%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-12-2021
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

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

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.74%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

+0.06 pp

From 1.69% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.74%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Bitdefender1 product

1 vendor · 1 product

References

1 links