peter bassill · operator
$ cve CVE-2018-18500 JSON

CVE-2018-18500

9.8
CRITICAL · CVSS 3.0 · EPSS 12.7% (pctl 96)

Patch early

EPSS 12.7% — above the 10% action threshold.

Description

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

Scoring

CVSS9.8 (CRITICAL, v3.0)
VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS12.66% — more likely to be exploited than 96% of all CVEs
WeaknessCWE-416
On CISA KEVno
Public exploitnone known
Published2019-02-05
Last modified2026-06-17

Affected (11)

VendorProduct
canonicalubuntu linux
debiandebian linux
mozillafirefox
mozillafirefox esr
mozillathunderbird
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux server eus
redhatenterprise linux server tus
redhatenterprise linux workstation

References

→ the Explorer  ·  watch your stack  ·  NVD