CVE-2014-3146

Exp

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.

Published: 2014-05-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-3146 is rated High Exploit Risk (73.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.33%, 93th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.06% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2014-3146

EDB-ID Source Kind Published Link
39155 exploit_db edb 2014-04-15 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2014-3146

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.27% 6.33% +2.06%
2 2026-03-24 4.36% 4.27% -0.09%
3 2026-03-06 — 4.36% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-3146

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 134c704f-9b21-4f2e-91b3-4a467353bcc0
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2014-3146

GitHub Security Advisory for CVE-2014-3146

GHSA-57qw-cc2g-pv5p · Severity: medium · Ecosystem: pip — lxml Cross-site Scripting Via Control Characters

OS Trackers for CVE-2014-3146

vendor priority summary link
debian not yet assigned CVE-2014-3146 not yet assigned priority: Debian including 1 source packages (lxml), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-3146
redhat low — https://access.redhat.com/security/cve/CVE-2014-3146
ubuntu medium CVE-2014-3146 medium priority: Ubuntu including 1 source packages (lxml), 6 status rows across 6 suites (lucid, precise, quantal, saucy, trusty, upstream): released 4, ignored 2. https://ubuntu.com/security/CVE-2014-3146

NVD evaluator notes for CVE-2014-3146

Comment: Per: http://cwe.mitre.org/data/definitions/184.html "CWE-184: Incomplete Blacklist"

Affected software / configurations for CVE-2014-3146

Vendor Product Version Raw CPE
lxml lxml <= 3.3.4 cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*
lxml lxml 0.5 cpe:2.3:a:lxml:lxml:0.5:*:*:*:*:*:*:*
lxml lxml 0.5.1 cpe:2.3:a:lxml:lxml:0.5.1:*:*:*:*:*:*:*
lxml lxml 0.6 cpe:2.3:a:lxml:lxml:0.6:*:*:*:*:*:*:*
lxml lxml 0.7 cpe:2.3:a:lxml:lxml:0.7:*:*:*:*:*:*:*
lxml lxml 0.8 cpe:2.3:a:lxml:lxml:0.8:*:*:*:*:*:*:*
lxml lxml 0.9 cpe:2.3:a:lxml:lxml:0.9:*:*:*:*:*:*:*
lxml lxml 0.9.1 cpe:2.3:a:lxml:lxml:0.9.1:*:*:*:*:*:*:*
lxml lxml 0.9.2 cpe:2.3:a:lxml:lxml:0.9.2:*:*:*:*:*:*:*
lxml lxml 1.0 cpe:2.3:a:lxml:lxml:1.0:*:*:*:*:*:*:*
lxml lxml 1.0.1 cpe:2.3:a:lxml:lxml:1.0.1:*:*:*:*:*:*:*
lxml lxml 1.0.2 cpe:2.3:a:lxml:lxml:1.0.2:*:*:*:*:*:*:*
lxml lxml 1.0.3 cpe:2.3:a:lxml:lxml:1.0.3:*:*:*:*:*:*:*
lxml lxml 1.0.4 cpe:2.3:a:lxml:lxml:1.0.4:*:*:*:*:*:*:*
lxml lxml 1.1 cpe:2.3:a:lxml:lxml:1.1:*:*:*:*:*:*:*
lxml lxml 1.1.1 cpe:2.3:a:lxml:lxml:1.1.1:*:*:*:*:*:*:*
lxml lxml 1.1.2 cpe:2.3:a:lxml:lxml:1.1.2:*:*:*:*:*:*:*
lxml lxml 1.2 cpe:2.3:a:lxml:lxml:1.2:*:*:*:*:*:*:*
lxml lxml 1.2.1 cpe:2.3:a:lxml:lxml:1.2.1:*:*:*:*:*:*:*
lxml lxml 1.3 cpe:2.3:a:lxml:lxml:1.3:*:*:*:*:*:*:*
lxml lxml 1.3.1 cpe:2.3:a:lxml:lxml:1.3.1:*:*:*:*:*:*:*
lxml lxml 1.3.2 cpe:2.3:a:lxml:lxml:1.3.2:*:*:*:*:*:*:*
lxml lxml 1.3.3 cpe:2.3:a:lxml:lxml:1.3.3:*:*:*:*:*:*:*
lxml lxml 1.3.4 cpe:2.3:a:lxml:lxml:1.3.4:*:*:*:*:*:*:*
lxml lxml 1.3.5 cpe:2.3:a:lxml:lxml:1.3.5:*:*:*:*:*:*:*
lxml lxml 1.3.6 cpe:2.3:a:lxml:lxml:1.3.6:*:*:*:*:*:*:*
lxml lxml 2.0 cpe:2.3:a:lxml:lxml:2.0:*:*:*:*:*:*:*
lxml lxml 2.0.1 cpe:2.3:a:lxml:lxml:2.0.1:*:*:*:*:*:*:*
lxml lxml 2.0.2 cpe:2.3:a:lxml:lxml:2.0.2:*:*:*:*:*:*:*
lxml lxml 2.0.3 cpe:2.3:a:lxml:lxml:2.0.3:*:*:*:*:*:*:*
lxml lxml 2.0.4 cpe:2.3:a:lxml:lxml:2.0.4:*:*:*:*:*:*:*
lxml lxml 2.0.5 cpe:2.3:a:lxml:lxml:2.0.5:*:*:*:*:*:*:*
lxml lxml 2.0.6 cpe:2.3:a:lxml:lxml:2.0.6:*:*:*:*:*:*:*
lxml lxml 2.0.7 cpe:2.3:a:lxml:lxml:2.0.7:*:*:*:*:*:*:*
lxml lxml 2.0.8 cpe:2.3:a:lxml:lxml:2.0.8:*:*:*:*:*:*:*
lxml lxml 2.0.9 cpe:2.3:a:lxml:lxml:2.0.9:*:*:*:*:*:*:*
lxml lxml 2.0.10 cpe:2.3:a:lxml:lxml:2.0.10:*:*:*:*:*:*:*
lxml lxml 2.0.11 cpe:2.3:a:lxml:lxml:2.0.11:*:*:*:*:*:*:*
lxml lxml 2.1 cpe:2.3:a:lxml:lxml:2.1:alpha1:*:*:*:*:*:*
lxml lxml 2.1 cpe:2.3:a:lxml:lxml:2.1:beta1:*:*:*:*:*:*
lxml lxml 2.1 cpe:2.3:a:lxml:lxml:2.1:beta2:*:*:*:*:*:*
lxml lxml 2.1 cpe:2.3:a:lxml:lxml:2.1:beta3:*:*:*:*:*:*
lxml lxml 2.1.1 cpe:2.3:a:lxml:lxml:2.1.1:*:*:*:*:*:*:*
lxml lxml 2.1.2 cpe:2.3:a:lxml:lxml:2.1.2:*:*:*:*:*:*:*
lxml lxml 2.1.3 cpe:2.3:a:lxml:lxml:2.1.3:*:*:*:*:*:*:*
lxml lxml 2.1.4 cpe:2.3:a:lxml:lxml:2.1.4:*:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:-:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:alpha1:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:beta1:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:beta2:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:beta3:*:*:*:*:*:*
lxml lxml 2.2 cpe:2.3:a:lxml:lxml:2.2:beta4:*:*:*:*:*:*
lxml lxml 2.2.1 cpe:2.3:a:lxml:lxml:2.2.1:*:*:*:*:*:*:*
lxml lxml 2.2.2 cpe:2.3:a:lxml:lxml:2.2.2:*:*:*:*:*:*:*
lxml lxml 2.2.3 cpe:2.3:a:lxml:lxml:2.2.3:*:*:*:*:*:*:*
lxml lxml 2.2.4 cpe:2.3:a:lxml:lxml:2.2.4:*:*:*:*:*:*:*
lxml lxml 2.2.5 cpe:2.3:a:lxml:lxml:2.2.5:*:*:*:*:*:*:*
lxml lxml 2.2.6 cpe:2.3:a:lxml:lxml:2.2.6:*:*:*:*:*:*:*
lxml lxml 2.2.7 cpe:2.3:a:lxml:lxml:2.2.7:*:*:*:*:*:*:*
lxml lxml 2.2.8 cpe:2.3:a:lxml:lxml:2.2.8:*:*:*:*:*:*:*
lxml lxml 2.3 cpe:2.3:a:lxml:lxml:2.3:-:*:*:*:*:*:*
lxml lxml 2.3 cpe:2.3:a:lxml:lxml:2.3:alpha1:*:*:*:*:*:*
lxml lxml 2.3 cpe:2.3:a:lxml:lxml:2.3:alpha2:*:*:*:*:*:*
lxml lxml 2.3 cpe:2.3:a:lxml:lxml:2.3:beta1:*:*:*:*:*:*
lxml lxml 2.3.1 cpe:2.3:a:lxml:lxml:2.3.1:*:*:*:*:*:*:*
lxml lxml 2.3.2 cpe:2.3:a:lxml:lxml:2.3.2:*:*:*:*:*:*:*
lxml lxml 2.3.3 cpe:2.3:a:lxml:lxml:2.3.3:*:*:*:*:*:*:*
lxml lxml 2.3.4 cpe:2.3:a:lxml:lxml:2.3.4:*:*:*:*:*:*:*
lxml lxml 2.3.5 cpe:2.3:a:lxml:lxml:2.3.5:*:*:*:*:*:*:*
lxml lxml 2.3.6 cpe:2.3:a:lxml:lxml:2.3.6:*:*:*:*:*:*:*
lxml lxml 3.0 cpe:2.3:a:lxml:lxml:3.0:-:*:*:*:*:*:*
lxml lxml 3.0 cpe:2.3:a:lxml:lxml:3.0:alpha1:*:*:*:*:*:*
lxml lxml 3.0 cpe:2.3:a:lxml:lxml:3.0:alpha2:*:*:*:*:*:*
lxml lxml 3.0 cpe:2.3:a:lxml:lxml:3.0:beta1:*:*:*:*:*:*
lxml lxml 3.0.1 cpe:2.3:a:lxml:lxml:3.0.1:*:*:*:*:*:*:*
lxml lxml 3.0.2 cpe:2.3:a:lxml:lxml:3.0.2:*:*:*:*:*:*:*
lxml lxml 3.1 cpe:2.3:a:lxml:lxml:3.1:beta1:*:*:*:*:*:*
lxml lxml 3.1.0 cpe:2.3:a:lxml:lxml:3.1.0:*:*:*:*:*:*:*
lxml lxml 3.1.1 cpe:2.3:a:lxml:lxml:3.1.1:*:*:*:*:*:*:*
lxml lxml 3.1.2 cpe:2.3:a:lxml:lxml:3.1.2:*:*:*:*:*:*:*

References for CVE-2014-3146

cvelogic Threat Intelligence