VulnerabilityModified
CVE-2018-12372
Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward.
MEDIUM 6.5EPSS 2.47%
Does this matter?
Lower severity and a low EPSS score (2.47%). Track it; it rarely justifies an emergency change on its own.
Description
Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 2.47% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- mozilla/thunderbird · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation · debian/debian linux · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/104613Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2251Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2252Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1419417Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00013.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3714-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4244Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-18/Vendor Advisory
- http://www.securityfocus.com/bid/104613Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2251Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2252Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1419417Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00013.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3714-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4244Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-18/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.