9.8

CVE-2020-6823: mozilla firefox Missing Authorization

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2020-6823
Published 24-04-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-6823 is a critical (CVSS 9.8) Missing Authorization vulnerability in mozilla firefox. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.5% 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
1.61%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1USN-4323-1

Timeline

  1. 24-04-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A malicious extension could have called <code>browser.identity.launchWebAuthFlow</code>, controlling the redirect_uri, and through the Promise returned, obtain the Auth code and gain access to the user's account at the service provider. This vulnerability affects Firefox < 75.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.61%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

0.00 pp

From 1.61% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.61%

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< 75.0+build3-0ubuntu0.16.04.1 | < 75.0+build3-0ubuntu0.18.04.1 | < 75.0+build3-0ubuntu1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Mozilla1 product
  • firefox≥ unspecified, < 75 | < 75.0

2 vendors · 5 products

References

6 links