CVE-2022-27820

OWASP Zed Attack Proxy (ZAP) through w2022-03-21 does not verify the TLS certificate chain of an HTTPS server.

Published: 2022-03-24 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-27820 is rated Low Risk (27.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.13%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-27820

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-04-23 0.21% 0.13% -0.08%
2 2025-04-10 0.29% 0.21% -0.08%
3 2025-04-07 — 0.29% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-27820

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 1.4 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2022-27820

GitHub Security Advisory for CVE-2022-27820

GHSA-j7xg-5549-jr3j · Severity: medium · Ecosystem: maven — Improper Certificate Validation in OWASP ZAP

Affected software / configurations for CVE-2022-27820

Vendor Product Version Raw CPE
owasp zed_attack_proxy <= w2022-03-21 cpe:2.3:a:owasp:zed_attack_proxy:*:*:*:*:*:*:*:*

References for CVE-2022-27820

URL Tags
http://www.openwall.com/lists/oss-security/2022/03/24/3 Mailing List Third Party Advisory
https://github.com/zaproxy/zaproxy/releases Release Notes Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/23/1 Mailing List Third Party Advisory
https://github.com/zaproxy/zaproxy/issues/7165 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence