5.3

CVE-2020-6813: mozilla firefox

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2020-6813
Published 25-03-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-6813 is a medium (CVSS 5.3) vulnerability in mozilla firefox. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.1% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
1.22%
0%100%
Low · +0.01 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 4
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1SUSE-SU-2020:1899-1USN-4299-1

Timeline

  1. 25-03-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker to inject arbitrary styles, bypassing the intent of the Content Security Policy. This vulnerability affects Firefox < 74.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.01 pp

From 1.20% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.22%

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

No weakness data has been published for this record.

Affected systems

Ubuntu3 products
  • firefox< 74.0+build3-0ubuntu0.16.04.1 | < 74.0+build3-0ubuntu0.18.04.1 | < 74.0+build3-0ubuntu1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Mozilla1 product
  • firefox≥ unspecified, < 74 | < 74.0

2 vendors · 4 products

References

6 links