Prototype pollution in Properties - CVE-2020-28471

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Main Vulnerability Database Vulnerabilities #VU118654

Prototype pollution in Properties - CVE-2020-28471

Published: November 20, 2025


Vulnerability identifier: #VU118654
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-28471
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary JavaScript code.

The vulnerability exists due to improper input validation. A remote attacker can pass specially crafted input to the application and perform prototype pollution, which can result in information disclosure or data manipulation.


Affected software

Properties
Bitbucket Server
Bitbucket Data Center

How to mitigate CVE-2020-28471

Install updates from vendor's website.

Properties - update to 2.2.0
Bitbucket Server - update to 8.19.25
Bitbucket Data Center - update to 8.19.25

External References

Related Security Bulletins