HOMEVULNERABILITIESCVE-2020-12619
MEDIUM

CVE-2020-12619

NVD-CWE-noinfoPublished: August 20, 2020· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2020-12619 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

freron1 product(s)
mailmate
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://updates.mailmate-app.com/2.0/release_notes
ADVISORYhttps://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf
ADVISORYhttps://updates.mailmate-app.com/2.0/release_notes
ADVISORYhttps://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf

All References (4)

→
https://updates.mailmate-app.com/2.0/release_notesRelease Notes · Vendor Advisory
→
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdfThird Party Advisory
→
https://updates.mailmate-app.com/2.0/release_notesRelease Notes · Vendor Advisory
→
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdfThird Party Advisory

Quick Facts

CVE IDCVE-2020-12619
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedAug 20, 2020

Related CVEs (NVD-CWE-noinfo)

CVE-2014-2632
10.0
CVE-2014-3175
10.0
CVE-2014-3525
10.0
CVE-2014-0609
10.0
CVE-2014-2648
10.0
CVE-2014-0554
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-12619 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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