CVE-2018-5168

moderate-risk
Published 2018-06-11

Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Do I need to act?

~
1.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Redhat Mozilla Canonical

References (36)

Third Party Advisory http://www.securityfocus.com/bid/104136
Third Party Advisory http://www.securitytracker.com/id/1040896
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1414
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1415
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1725
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1726
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1449548
Mailing List https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html
Mailing List https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html
Third Party Advisory https://security.gentoo.org/glsa/201810-01
Third Party Advisory https://security.gentoo.org/glsa/201811-13
Third Party Advisory https://usn.ubuntu.com/3645-1/
Third Party Advisory https://usn.ubuntu.com/3660-1/
Third Party Advisory https://www.debian.org/security/2018/dsa-4199
Third Party Advisory https://www.debian.org/security/2018/dsa-4209
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-11/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-12/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-13/
Third Party Advisory http://www.securityfocus.com/bid/104136
Third Party Advisory http://www.securitytracker.com/id/1040896
and 16 more references
44
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 3/34 · Minimal
Exposure 20/34 · Moderate