What is CVE-2017-7848?

CVE-2017-7848 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.3/10. Published 2018-06-11.

How severe is CVE-2017-7848?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Mozilla Thunderbird

CVE-2017-7848

RSS fields can inject new lines into the created email structure, modifying the message body. This vulnerability affects Thunderbird < 52.5.2.

Published 2018-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.018 (77.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Mozilla Thunderbird — versions unspecified
Debian Linux — versions 7.0, 8.0, 9.0
Red Hat Enterprise Linux — versions 6.0, 7.0
Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
Red Hat Enterprise Linux Server — versions 6.0, 7.0
Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4
Red Hat Enterprise Linux Server Eus — versions 7.3, 7.4, 7.5
Red Hat Enterprise Linux Workstation — versions 6.0, 7.0

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

lists.debian.org/debian-lts-announce/2017/12/msg00026.html (mailing-list, Mailing List, Third Party Advisory)
bugzilla.mozilla.org/show_bug.cgi (Vendor Advisory, Permissions Required, Issue Tracking)
www.securityfocus.com/bid/102258 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1040123 (VDB Entry, Third Party Advisory, vdb-entry)
www.mozilla.org/security/advisories/mfsa2017-30/ (Vendor Advisory)
www.debian.org/security/2017/dsa-4075 (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:0061 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2017-7848?: CVE-2017-7848 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.3/10. Published 2018-06-11.
How severe is CVE-2017-7848?: Medium severity. CVSS v3 base score is 5.3 out of 10.