NLTK up to 3.9.3 nltk.app.wordnet_app cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in NLTK up to 3.9.3. This vulnerability affects the function nltk.app.wordnet_app. Such manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-33230. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in NLTK up to 3.9.3 and classified as problematic. Affected by this issue is the function nltk.app.wordnet_app. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, `nltk.app.wordnet_app` contains a reflected cross-site scripting issue in the `lookup_...` route. A crafted `lookup_<payload>` URL can inject arbitrary HTML/JavaScript into the response page because attacker-controlled `word` data is reflected into HTML without escaping. This impacts users running the local WordNet Browser server and can lead to script execution in the browser origin of that application. Commit 1c3f799607eeb088cab2491dcf806ae83c29ad8f fixes the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-33230 since 03/18/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 303268 (Linux Distros Unpatched Vulnerability : CVE-2026-33230), which helps to determine the existence of the flaw in a target environment.

Applying the patch 1c3f799607eeb088cab2491dcf806ae83c29ad8f is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (303268) and CERT Bund (WID-SEC-2026-0895). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • IBM App Connect Enterprise

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.1
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 303268
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-33230

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 1c3f799607eeb088cab2491dcf806ae83c29ad8f

Timelineinfo

03/18/2026 CVE reserved
03/21/2026 +3 days Advisory disclosed
03/21/2026 +0 days VulDB entry created
03/28/2026 +7 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-gfwx-w7gr-fvh7
Status: Confirmed

CVE: CVE-2026-33230 (🔒)
GCVE (CVE): GCVE-0-2026-33230
GCVE (VulDB): GCVE-100-352256
CERT Bund: WID-SEC-2026-0895 - IBM App Connect Enterprise: Mehrere Schwachstellen

Entryinfo

Created: 03/21/2026 07:53
Updated: 03/28/2026 04:46
Changes: 03/21/2026 07:53 (65), 03/22/2026 11:18 (2), 03/27/2026 06:05 (2), 03/28/2026 04:46 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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