CVE-2018-5098
A use-after-free vulnerability can occur when form input elements, focus, and selections are manipulated by script content.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.01%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A use-after-free vulnerability can occur when form input elements, focus, and selections are manipulated by script content. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.01% probability · 87th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- debian/debian linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · mozilla/firefox · mozilla/thunderbird · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 3.0% 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/102783Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0122Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0262Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1399400Issue Tracking, Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/01/msg00030.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/01/msg00036.htmlThird Party Advisory
- https://usn.ubuntu.com/3544-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4096Third Party Advisory
- https://www.debian.org/security/2018/dsa-4102Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-02/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-03/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-04/Vendor Advisory
- http://www.securityfocus.com/bid/102783Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0122Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0262Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1399400Issue Tracking, Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/01/msg00030.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/01/msg00036.htmlThird Party Advisory
- https://usn.ubuntu.com/3544-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4096Third Party Advisory
- https://www.debian.org/security/2018/dsa-4102Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-02/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-03/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-04/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.