6.1

CVE-2014-3146: lxml Cross-site Scripting

CVSS: 6.1v3.1MediumModified
AliasesMGASA-2014-0218GHSA-57qw-cc2g-pv5pPYSEC-2014-9
Published 14-05-2014Last modified 17-12-2025
Open JSON

Vulnerability summary

CVE-2014-3146 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in lxml. EPSS estimates a 6.33% chance of exploitation in the next 30 days, higher than 93.5% of scored vulnerabilities. 4 public exploits are recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
6.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits4reference, exploit-database

Timeline

  1. 14-05-2014
    PublishedVulnerability first disclosed.
  2. 17-12-2025
    Last modifiedVulnerability information updated.

Description

Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

CVSS metrics

7 scores · 5 sources · 3 versions

EPSS trend

Probability

6.33%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 6.33% on 19-09-2026

19-09-202619-10-2026
EPSS score
6.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

4 found
  • referenceUnverified

    Exploit Reference (mailman-mail5.webfaction.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (securityfocus.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (seclists.org)

    Maturity: unknown

Show all 4 exploits
  • exploit-databaseremotelinuxVerified

    lxml - 'clean_html' Security Bypass

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Mageia2 products
  • python-lxml< 3.0.1-2.1.mga3
  • python-lxml< 3.2.4-1.1.mga4
Debian1 product
  • lxml< 3.3.5-1 | < 2.2.8-2+deb6u1 | < 2.3.2-1+deb7u1
Lxml1 product
  • lxml≤ 3.3.4 | 0.5 | 0.5.1 | 0.6 | 0.7 | 0.8 | 0.9 | 0.9.1 | 0.9.2 | 1.0 | 1.0.1 | 1.0.2 | 1.0.3 | 1.0.4 | 1.1 | 1.1.1 | 1.1.2 | 1.2 | 1.2.1 | 1.3 | 1.3.1 | 1.3.2 | 1.3.3 | 1.3.4 | 1.3.5 | 1.3.6 | 2.0 | 2.0.1 | 2.0.2 | 2.0.3 | 2.0.4 | 2.0.5 | 2.0.6 | 2.0.7 | 2.0.8 | 2.0.9 | 2.0.10 | 2.0.11 | 2.1:alpha1 | 2.1:beta1 | 2.1:beta2 | 2.1:beta3 | 2.1.1 | 2.1.2 | 2.1.3 | 2.1.4 | 2.2 | 2.2:alpha1 | 2.2:beta1 | 2.2:beta2 | 2.2:beta3 | 2.2:beta4 | 2.2.1 | 2.2.2 | 2.2.3 | 2.2.4 | 2.2.5 | 2.2.6 | 2.2.7 | 2.2.8 | 2.3 | 2.3:alpha1 | 2.3:alpha2 | 2.3:beta1 | 2.3.1 | 2.3.2 | 2.3.3 | 2.3.4 | 2.3.5 | 2.3.6 | 3.0 | 3.0:alpha1 | 3.0:alpha2 | 3.0:beta1 | 3.0.1 | 3.0.2 | 3.1:beta1 | 3.1.0 | 3.1.1 | 3.1.2 | 3.2.0 | 3.2.1 | 3.2.2 | 3.2.3 | 3.2.4 | 3.2.5 | 3.3.0 | 3.3.0:beta1 | 3.3.0:beta2 | 3.3.0:beta3 | 3.3.0:beta4 | 3.3.0:beta5 | 3.3.1 | 3.3.2 | 3.3.3
PyPI1 product
  • lxml< 3.3.5
Ubuntu1 product
  • lxml< 3.3.3-1ubuntu0.1

5 vendors · 6 products

References

35 links
Show all 35 references