CVE-2026-33230 nltk Vulnerable to Cross-site Scripting

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

CVE-2026-33230

NLTK WordNet Browser (nltk.app.wordnet_app) in versions <= 3.9.3 contains a reflected XSS in the lookup_ route, where attacker-controlled word data is echoed into HTML without escaping, enabling arbitrary HTML/JS execution in the local browser context. Public advisories and vendor notices conf...

CVE-2026-33230

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

CVE-2026-33230: Improper Neutralization of Input During Web Page Generation

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

Missing Authentication for Critical Function

Overview nltk is a Natural Language Toolkit NLTK is a Python package for natural language processing. Affected versions of this package are vulnerable to Missing Authentication for Critical Function in WordNet Browser HTTP server in default configuration. An attacker can cause the service to...

PT-2026-26299

Name of the Vulnerable Software and Affected Versions NLTK versions 3.9.3 and prior Description NLTK’s nltk.app.wordnet app component allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when started in its default mode. A simple GET /SHUTDOWN%20THE%20SERVER request to...

RCE in Wordnet Browser

Description A user who visits a malicious link with wordnet browser open will execute code on system Proof of Concept Visit http://localhost:8000/lookupgASVKwAAAAAAAACMBXBvc2l4lIwGc3lzdGVtlJOUjBB0b3VjaCAvdG1wL1BXTkVElIWUUpQu The base64 is created from import pickle import sys import base64...