What is CVE-2020-27986?

CVE-2020-27986 is a high-severity vulnerability in Sonarsource Sonarqube, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2020-10-28.

How severe is CVE-2020-27986?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-27986 known to be exploited?

31 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Sonarsource Sonarqube

CVE-2020-27986

SonarQube 8.4.2.36762 allows remote attackers to discover cleartext SMTP, SVN, and GitLab credentials via the api/settings/values URI. NOTE: reportedly, the vendor's position for SMTP and SVN is "it is the administrator's responsibility to configure it.

Vulnerability class: Broken Authentication

Published 2020-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.160 (96.8th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.164 · newest: 0.160 · change: -0.004

Affected products

Sonarsource Sonarqube — versions 8.4.2.36762

Weakness classification (CWE)

Public proof-of-concept exploits

References

csl.com.co/sonarqube-auditando-al-auditor-parte-i/ (Vendor Advisory)

Frequently asked questions

What is CVE-2020-27986?: CVE-2020-27986 is a high-severity vulnerability in Sonarsource Sonarqube, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2020-10-28.
How severe is CVE-2020-27986?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-27986 known to be exploited?: 31 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.