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TI-2020-10038 Aliases CVE-2020-12619GHSA-fvwq-3pcx-4fvr

MailMate before 1.11 automatically imported S/MIME certificates and thereby silently…

Priority LOW 27Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.

Why it matters now

EPSS 0.00429 37th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:freron:mailmate:*:*:*:*:*:*:*:*before 1.11VulnerableFreron
  • cpe:2.3:a:freron:mailmate:*:*:*:*:*:*:*:* Versions before 1.11 Vulnerable ·Freron

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12619
  2. 2026-10-03 Alias added: GHSA-fvwq-3pcx-4fvr

References

Advisory 2

  • TI-2018-11119 MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email. CVSS 3.0HIGH 7.5
  • TI-2017-12945 The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack… CVSS 3.0MEDIUM 5.9
  • TI-2017-12946 The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack… CVSS 3.0MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences