How severe is CVE-2018-15586?

CVE-2018-15586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-15586 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15586?

CVE-2018-15586 affects Enigmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15586?

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

When was CVE-2018-15586 published?

CVE-2018-15586 was published on 2019-02-11 and last updated on 2026-06-17.

CVE-2018-15586

CVE-2018-15586 is a medium-severity vulnerability in Enigmail with a CVSS 3.x base score of 6.5. 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-347.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Enigmail
Published: 2019-02-11
Last modified: 2026-06-17

Description

Enigmail before 2.0.6 is prone to to OpenPGP signatures being spoofed for arbitrary messages using a PGP/INLINE signature wrapped within a specially crafted multipart HTML email.

Frequently asked questions

What is CVE-2018-15586?: Enigmail before 2.0.6 is prone to to OpenPGP signatures being spoofed for arbitrary messages using a PGP/INLINE signature wrapped within a specially crafted multipart HTML email.
How severe is CVE-2018-15586?: CVE-2018-15586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-15586 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15586?: CVE-2018-15586 affects Enigmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15586?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-15586 published?: CVE-2018-15586 was published on 2019-02-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:enigmail:enigmail:*:*:*:*:*:*:*:*

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