CVE-2026-31153
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 in Bynder v0.1.394 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.
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 confidenceBynder v0.1.394 contains a stored cross-site scripting (XSS) vulnerability where attackers can inject malicious scripts or HTML through a crafted payload that gets persisted in the application and executed when other users view the affected content.
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 installed Bynder versionAccess the Bynder admin interface, typically via /admin/settings or check the application's footer/version info. Alternatively, check the package.json, version file, or API endpoint that returns version information.Affected if The installed version is v0.1.394 or falls within an unpatched version range prior to the fix.
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Locate user-supplied input fieldsReview the application for fields that accept and persist user content, such as asset titles, descriptions, metadata fields, comments, or custom property values.Affected if The application accepts user input that gets stored and displayed back to other users without immediate sanitization.
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Test for output encoding on stored contentInspect the application code or HTTP responses when viewing stored content. Check if special characters like <, >, ", ', and script tags are encoded (e.g., < becomes <) when rendered to other users.Affected if Output encoding is not applied; raw HTML or script tags render unescaped in the browser.
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Verify if input sanitization is presentReview the application's data handling logic or check response headers/HTML source for Content Security Policy (CSP) headers or sanitization libraries (e.g., DOMPurify, sanitize-html) being used on user inputs.Affected if No input sanitization or CSP is configured to block script execution from stored payloads.
You are affected if you are running Bynder v0.1.394 (or an unpatched version) and user-supplied content fields lack output encoding or sanitization, allowing stored XSS to execute.
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 dataUpgrade to a patched version of Bynder and implement output encoding/sanitization on all user-supplied input fields to prevent script execution.
- Consultation3.0 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-2026-31153 — 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-2026-31153 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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