How severe is CVE-2019-20057?

CVE-2019-20057 has a CVSS 3.x base score of 3.7, rated low 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-2019-20057 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20057?

CVE-2019-20057 affects Proxyman. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20057?

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

When was CVE-2019-20057 published?

CVE-2019-20057 was published on 2019-12-29 and last updated on 2026-06-17.

CVE-2019-20057

CVE-2019-20057 is a low-severity vulnerability in Proxyman with a CVSS 3.x base score of 3.7. 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-345.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
CVSS v2: 4.3
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Proxyman
Published: 2019-12-29
Last modified: 2026-06-17

Description

com.proxyman.NSProxy.HelperTool in Privileged Helper Tool in Proxyman for macOS 1.11.0 and earlier allows an attacker to change the System Proxy and redirect all traffic to an attacker-controlled computer, enabling MITM attacks.

Frequently asked questions

What is CVE-2019-20057?: com.proxyman.NSProxy.HelperTool in Privileged Helper Tool in Proxyman for macOS 1.11.0 and earlier allows an attacker to change the System Proxy and redirect all traffic to an attacker-controlled computer, enabling MITM attacks.
How severe is CVE-2019-20057?: CVE-2019-20057 has a CVSS 3.x base score of 3.7, rated low 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-2019-20057 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20057?: CVE-2019-20057 affects Proxyman. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20057?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20057 published?: CVE-2019-20057 was published on 2019-12-29 and last updated on 2026-06-17.

References

https://github.com/ProxymanApp/Proxyman/issues/364

Affected products (1)

cpe:2.3:a:proxyman:proxyman:*:*:*:*:*:macos:*:*

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