CVE-2026-30048
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4. User-supplied input is not properly sanitized before being stored and rendered in the chat conversation history. This allows an attacker to inject arbitrary JavaScript code which is executed when the chat history is reloaded. The issue is reproducible across multiple independent implementations of the widget, indicating that the vulnerability resides in the product itself rather than in a specific website configuration.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceStored XSS vulnerability in NotChatbot WebChat widget through version 1.4.4 allows injection of arbitrary JavaScript via unsanitized user input that persists in chat conversation history and executes when the chat history is subsequently loaded.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify NotChatbot WebChat widget installationSearch your application codebase or dependencies for the NotChatbot WebChat widget package/module. Check package.json, node_modules, or any included JavaScript files for 'notchatbot' or 'webchat' references.Affected if NotChatbot WebChat widget is present in your environment
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Determine installed versionLocate the version number in your package.json, package-lock.json, or the widget's JavaScript file (often in a comment header or version property). Compare against the affected range: version 1.4.4 or lower is vulnerable.Affected if Installed version is 1.4.4 or any earlier version
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Verify chat input handling is presentExamine your server-side code that processes chat message submissions. Look for the endpoint or function that receives user messages before they are stored.Affected if Chat input processing exists and accepts user-provided content
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Inspect message storage mechanismExamine the database or storage where chat messages are saved. Look for raw unsanitized user input stored directly without sanitization or encoding applied.Affected if User input is stored without sanitization
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Check chat history renderingReview the front-end code that retrieves and displays chat history. Look for how messages are rendered in the UI - specifically whether output encoding is applied when displaying stored messages.Affected if Stored messages are rendered without proper output encoding
You are affected if NotChatbot WebChat widget version 1.4.4 or lower is installed AND user-supplied chat messages are stored and displayed without sanitization and output encoding.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate to patched version if available; implement robust input sanitization on the server side and output encoding when rendering chat messages; consider Content Security Policy headers to mitigate XSS impact.
- Consultation4.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-30048 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-30048 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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