7.4

CVE-2021-23961: debian debian_linux

CVSS: 7.4v3.1HighModified
AliasesUBUNTU-CVE-2021-23961DEBIAN-CVE-2021-23961
Published 26-02-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-23961 is a high (CVSS 7.4) vulnerability in debian debian_linux. EPSS estimates a 1.48% chance of exploitation in the next 30 days, higher than 73.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (NVD)
EPSS score
1.48%
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 27 · Related 13
DLA-2632-1DLA-2633-1DSA-4895-1DSA-4897-1MGASA-2021-0198MGASA-2021-0199

Timeline

  1. 26-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.48%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.48% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.48%

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

Ubuntu6 products
  • firefox< 85.0+build1-0ubuntu0.16.04.1 | < 85.0+build1-0ubuntu0.18.04.1 | < 85.0+build1-0ubuntu0.20.04.1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
  • mozjs78All versions (No fix recorded)
Debian3 products
  • firefox-esr< 78.10.0esr-1
  • thunderbird< 1:78.10.0-1
  • debian_linuxEOL9.0 | 10.0
Mozilla1 product

3 vendors · 10 products

References

15 links
Show all 15 references