How severe is CVE-2019-8337?

CVE-2019-8337 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-8337 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8337?

CVE-2019-8337 primarily affects Marlam Mpop. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-8337?

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

When was CVE-2019-8337 published?

CVE-2019-8337 was published on 2019-02-13 and last updated on 2026-06-17.

CVE-2019-8337

CVE-2019-8337 is a medium-severity vulnerability in Marlam Mpop with a CVSS 3.x base score of 5.3. 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 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Marlam Mpop
Published: 2019-02-13
Last modified: 2026-06-17

Description

In msmtp 1.8.2 and mpop 1.4.3, when tls_trust_file has its default configuration, certificate-verification results are not properly checked.

Frequently asked questions

What is CVE-2019-8337?: In msmtp 1.8.2 and mpop 1.4.3, when tls_trust_file has its default configuration, certificate-verification results are not properly checked.
How severe is CVE-2019-8337?: CVE-2019-8337 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-8337 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8337?: CVE-2019-8337 primarily affects Marlam Mpop. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-8337?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-8337 published?: CVE-2019-8337 was published on 2019-02-13 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:marlam:mpop:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:marlam:msmtp:1.8.2:*:*:*:*:*:*:*

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