CVE-2019-11707

ENISA EUVD: EUVD-2019-3377 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 5, 2026 3 articles Published: 2019-07-23
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
84.29%
probability
This CVE has a 84.29% probability of being exploited in the next 30 days.
0% Top 99.3th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
8.8
HIGH
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2 (legacy)

7.5
HIGH
Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P

Description

VulnerabilityLookup (CNA)
A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

Affected Products

Mozilla
Firefox ESR
unspecified
Mozilla
Firefox
unspecified
Mozilla
Thunderbird
unspecified

Attack Intelligence

Google Project Zero

Patched
June 18, 2019
Reported by
Samuel Groß of Google Project Zero, Coinbase Security
Root Cause Analysis
https://googleprojectzero.github.io/0days-in-the-wild//0day-RCAs/2019/CVE-2019-11707.html

Exploits & PoC

vigneshsrao/CVE-2019-11707

Exploit code for CVE-2019-11707 on Firefox 66.0.3 running on Ubuntu

42 2019-08-18
flabbergastedbd/cve-2019-11707

https://bugs.chromium.org/p/project-zero/issues/detail?id=1820

2 2020-04-14
CosminGGeorgescu/CVE-2019-11707-PoC

Proof of concept for CVE-2019-11707

0 2026-02-05
3 repos — triés par ⭐ Rechercher sur GitHub ↗

Signal Intelligence

Confidenceⓘ
95%
EPSS 84.29%
CVSS v3.1 8.8
Mentions 3
Last Seen Jun 20, 2019

CNA Information

CNA Assigner
mozilla

Analyst Note

Auto-imported from Google Project Zero — confirmed zero-day by definition.

Triage Info

Decided atMar 05, 2026
Published DateJul 23, 2019