What’s Vulnerable › Vulnerabilities

CVE-2018-15588

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-02-11 · updated 2026-06-17
• Weakness: CWE-290

Description

MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email.

Affected products

• Freron Mailmate: before 1.11.3 — fixed in 1.11.3

How to fix

Upgrade to a fixed version: Freron Mailmate 1.11.3. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
• http://seclists.org/fulldisclosure/2019/Apr/38
• http://www.openwall.com/lists/oss-security/2019/04/30/4
• https://github.com/RUB-NDS/Johnny-You-Are-Fired
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
• https://updates.mailmate-app.com/release_notes
• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
• http://seclists.org/fulldisclosure/2019/Apr/38
• http://www.openwall.com/lists/oss-security/2019/04/30/4
• https://github.com/RUB-NDS/Johnny-You-Are-Fired
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
• https://updates.mailmate-app.com/release_notes

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