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📦
📦 npm
Not in CISA KEV
MEDIUM severity

CVE-2023-37905 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in ckeditor-wordcount-plugin. O3 Security confirms whether CVE-2023-37905 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Cross-site Scripting (XSS) in Source Mode of Editor in ckeditor-wordcount-plugin

Also known asGHSA-q9w4-w667-qqj4
Published
Jul 21, 2023
Updated
Aug 8, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Aug 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
📦ckeditor-wordcount-plugin

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

Description

ckeditor-wordcount-plugin is an open source WordCount Plugin for CKEditor. It has been discovered that the ckeditor-wordcount-plugin plugin for CKEditor4 is susceptible to cross-site scripting when switching to the source code mode. This issue has been addressed in version 1.17.12 of the ckeditor-wordcount-plugin plugin and users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmckeditor-wordcount-pluginall versions1.17.12

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ckeditor-wordcount-plugin. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update ckeditor-wordcount-plugin to 1.17.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37905 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2023-37905 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2023-37905. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

ckeditor-wordcount-plugin is an open source WordCount Plugin for CKEditor. It has been discovered that the `ckeditor-wordcount-plugin` plugin for CKEditor4 is susceptible to cross-site scripting when switching to the source code mode. This issue has been addressed in version 1.17.12 of the `ckeditor-wordcount-plugin` plugin and users are advised to upgrade. There are no known workarounds for this vulnerability.
O3 Security · Impact-Aware SCA

Is CVE-2023-37905 in your dependencies?

O3 detects CVE-2023-37905 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

CVE-2023-37905: ckeditor-wordcount-plugin… | O3 Security