9.8

CVE-2017-7821: mozilla firefox

CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2017-7821
Published 11-06-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-7821 is a critical (CVSS 9.8) vulnerability in mozilla firefox. EPSS estimates a 1.91% chance of exploitation in the next 30 days, higher than 79.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
1.91%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1USN-3435-1

Timeline

  1. 11-06-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability where WebExtensions can download and attempt to open a file of some non-executable file types. This can be triggered without specific user interaction for the file download and open actions. This could be used to trigger known vulnerabilities in the programs that handle those document types. This vulnerability affects Firefox < 56.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.91%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

-0.04 pp

From 1.95% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.91%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Mozilla1 product
  • firefox≥ unspecified, < 56 | ≤ 55.0.3
Ubuntu1 product
  • firefox< 56.0+build6-0ubuntu0.14.04.1 | < 56.0+build6-0ubuntu0.16.04.1 | < 56.0+build6-0ubuntu1

2 vendors · 2 products

References

8 links