CVE-2018-15588
CVE-2018-15588 is a high-severity vulnerability in Freron Mailmate 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-290.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-290
- Affected product: Freron Mailmate
- Published:
- Last modified:
Description
MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email.
Frequently asked questions
- What is CVE-2018-15588?
- MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email.
- How severe is CVE-2018-15588?
- CVE-2018-15588 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 none, integrity high, and availability none.
- Is CVE-2018-15588 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-15588?
- CVE-2018-15588 affects Freron Mailmate. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-15588?
- 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-2018-15588 published?
- CVE-2018-15588 was published on 2019-02-11 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:freron:mailmate:*:*:*:*:*:*:*:*
More vulnerabilities in Freron Mailmate
- CVE-2020-12619 — Medium (CVSS 5.9): MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This…
- CVE-2017-17689 — Medium (CVSS 5.9): The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to…
- CVE-2017-17688 — Medium (CVSS 5.9): The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to…
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