How severe is CVE-2018-20954?

CVE-2018-20954 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-20954 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20954?

CVE-2018-20954 primarily affects Mailpile. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20954?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-20954 published?

CVE-2018-20954 was published on 2019-08-08 and last updated on 2026-06-17.

CVE-2018-20954

CVE-2018-20954 is a high-severity vulnerability in Mailpile with a CVSS 3.x base score of 7.5. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Mailpile
Published: 2019-08-08
Last modified: 2026-06-17

Description

The "Security and Privacy" Encryption feature in Mailpile before 1.0.0rc4 does not exclude disabled, revoked, and expired keys.

Frequently asked questions

What is CVE-2018-20954?: The "Security and Privacy" Encryption feature in Mailpile before 1.0.0rc4 does not exclude disabled, revoked, and expired keys.
How severe is CVE-2018-20954?: CVE-2018-20954 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-20954 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20954?: CVE-2018-20954 primarily affects Mailpile. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20954?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-20954 published?: CVE-2018-20954 was published on 2019-08-08 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:mailpile:mailpile:0.5.0:*:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:0.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:0.5.2:*:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:1.0.0:rc0:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:1.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:1.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mailpile:mailpile:1.0.0:rc3:*:*:*:*:*:*

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