4.3

CVE-2012-4207: canonical ubuntu_linux Cross-site Scripting

CVSS: 4.3v2.0MediumModified
Published 21-11-2012Last modified 06-08-2024

Vulnerability summary

CVE-2012-4207 is a medium (CVSS 4.3) Cross-site Scripting vulnerability in canonical ubuntu_linux. EPSS estimates a 2.78% chance of exploitation in the next 30 days, higher than 86.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v2.0 (NVD)
EPSS score
2.78%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 8 · Related 3

Timeline

  1. 21-11-2012
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.78%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.78% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.78%

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

Mozilla4 products
Redhat4 products
Suse3 products
Canonical1 product
Debian1 product
Opensuse1 product

6 vendors · 14 products

References

30 links
Show all 30 references