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.
Metrics
Affected Vendors & Products
References
History
Tue, 24 Mar 2026 02:30:00 +0000
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ssvc
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Mon, 23 Mar 2026 19:15:00 +0000
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| CPEs | cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:* |
Mon, 23 Mar 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Mon, 23 Mar 2026 10:00:00 +0000
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Nltk
Nltk nltk |
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| Vendors & Products |
Nltk
Nltk nltk |
Fri, 20 Mar 2026 23:00:00 +0000
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Fri, 20 Mar 2026 22:45:00 +0000
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| Description | 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. | |
| Title | nltk Vulnerable to Cross-site Scripting | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-20T22:43:39.621Z
Updated: 2026-03-24T02:07:12.001Z
Reserved: 2026-03-18T02:42:27.507Z
Link: CVE-2026-33230
Updated: 2026-03-24T02:07:06.975Z
Status : Analyzed
Published: 2026-03-20T23:16:46.680
Modified: 2026-03-23T19:14:50.023
Link: CVE-2026-33230