What’s Vulnerable › Vulnerabilities

CVE-2021-20216

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-25 · updated 2026-06-17
• Weakness: CWE-400

Description

A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.

Affected products

• privoxy: before 3.0.31 — fixed in 3.0.31

How to fix

Upgrade to a fixed version: privoxy 3.0.31. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1923256
• https://security.gentoo.org/glsa/202107-16
• https://www.openwall.com/lists/oss-security/2021/01/31/2
• https://www.privoxy.org/3.0.31/user-manual/whatsnew.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1923256
• https://security.gentoo.org/glsa/202107-16
• https://www.openwall.com/lists/oss-security/2021/01/31/2
• https://www.privoxy.org/3.0.31/user-manual/whatsnew.html

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