7.5

CVE-2017-7783: mozilla firefox Improper Input Validation

CVSS: 7.5v3.0HighModified
AliasesUBUNTU-CVE-2017-7783
Published 11-06-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-7783 is a high (CVSS 7.5) Improper Input Validation vulnerability in mozilla firefox. EPSS estimates a 13.85% chance of exploitation in the next 30 days, higher than 96.4% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
13.85%
0%100%
Medium · +0.32 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference, exploit-database

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1USN-3391-1

Timeline

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

Description

If a long user name is used in a username/password combination in a site URL (such as " http://UserName:Password@example.com"), the resulting modal prompt will hang in a non-responsive state or crash, causing a denial of service. This vulnerability affects Firefox < 55.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

13.85%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

+0.32 pp

From 13.53% on 19-09-2026

19-09-202619-10-2026
EPSS score
13.85%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

  • exploit-databasedosmultipleVerified

    Mozilla Firefox < 55 - Denial of Service

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • firefox< 55.0.1+build2-0ubuntu0.14.04.2 | < 55.0.1+build2-0ubuntu0.16.04.2
  • mozjs38All versions (No fix recorded)
Mozilla1 product
  • firefox≥ unspecified, < 55 | < 55.0

2 vendors · 3 products

References

8 links