How severe is CVE-2022-27820?

CVE-2022-27820 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2022-27820 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-27820?

CVE-2022-27820 affects Owasp Zed Attack Proxy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-27820?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-27820 published?

CVE-2022-27820 was published on 2022-03-24 and last updated on 2026-06-17.

CVE-2022-27820

CVE-2022-27820 is a medium-severity vulnerability in Owasp Zed Attack Proxy with a CVSS 3.x base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Owasp Zed Attack Proxy
Published: 2022-03-24
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2022-27820?: OWASP Zed Attack Proxy (ZAP) through w2022-03-21 does not verify the TLS certificate chain of an HTTPS server.
How severe is CVE-2022-27820?: CVE-2022-27820 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2022-27820 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-27820?: CVE-2022-27820 affects Owasp Zed Attack Proxy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-27820?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-27820 published?: CVE-2022-27820 was published on 2022-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:owasp:zed_attack_proxy:*:*:*:*:*:*:*:*

Other CWE-295 (Improper Certificate Validation) vulnerabilities

CVE-2026-4370 — Critical (CVSS 10.0): A vulnerability was identified in Juju from version 3.2.0 until 3.6.19 and from version 4.0 until 4.0.4, where the…
CVE-2026-30836 — Critical (CVSS 10.0): Step CA is an online certificate authority for secure, automated certificate management for DevOps. Versions 0.30.0-rc6…
CVE-2025-68121 — Critical (CVSS 10.0): During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between…
CVE-2022-20703 — Critical (CVSS 10.0): Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker…
CVE-2021-1471 — Critical (CVSS 9.9): Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms…
CVE-2026-20184 — Critical (CVSS 9.8): A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed…

Browse all CWE-295 (Improper Certificate Validation) vulnerabilities →