9.8

CVE-2020-12390: mozilla firefox Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2020-12390
Published 26-05-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-12390 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in mozilla firefox. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 75.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.62%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1RHSA-2020:3557USN-4353-1

Timeline

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

Description

Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.62%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

+0.04 pp

From 1.58% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.62%

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

Ubuntu4 products
  • firefox< 76.0+build2-0ubuntu0.16.04.1 | < 76.0+build2-0ubuntu0.18.04.1 | < 76.0+build2-0ubuntu0.20.04.1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Mozilla1 product
  • firefox≥ unspecified, < 76 | < 76.0

2 vendors · 5 products

References

6 links