10

CVE-2020-12388: mozilla firefox Improper Input Validation

CVSS: 10.0v3.1CriticalModified
AliasesUBUNTU-CVE-2020-12388
Published 26-05-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-12388 is a critical (CVSS 10.0) Improper Input Validation vulnerability in mozilla firefox. EPSS estimates a 3.52% chance of exploitation in the next 30 days, higher than 89.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v3.1 (NVD)
EPSS score
3.52%
0%100%
Low · +0.81 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
OPENSUSE-SU-2020:0621-1OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1SUSE-SU-2020:1209-1SUSE-SU-2020:1218-1SUSE-SU-2020:14359-1

Timeline

  1. 26-05-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8 and Firefox < 76.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

3.52%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

+0.81 pp

From 2.71% on 21-09-2026

21-09-202621-10-2026
EPSS score
3.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu3 products
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Mozilla2 products

2 vendors · 5 products

References

8 links