CVE-2026-31016
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 · uneditedCross Site Request Forgery vulnerability in Squidex.io Squidex CMS v.7.21.0 and before allows a remote attacker to escalate privileges via the IdentityServer account profile endpoint
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 confidenceCross Site Request Forgery vulnerability in Squidex CMS versions 7.21.0 and earlier allows remote attackers to escalate privileges by tricking authenticated users into submitting forged requests to the IdentityServer account profile endpoint, potentially allowing the attacker to modify user profile data and permissions.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 Squidex versionLog into the Squidex admin interface and navigate to Settings > About, or inspect the Squidex version from the deployment configuration/package metadataAffected if The version is 7.21.0 or earlier (including any 7.x version below 7.21.0)
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Confirm IdentityServer profile endpoint existsLocate the IdentityServer endpoints in the Squidex installation directory or check the application's endpoint configuration for /identity-server/account/profile or similar pathsAffected if The IdentityServer account profile endpoint is present and accessible without additional authentication beyond session cookies
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Verify CSRF token presence on profile operationsInspect the HTML forms on the account profile page (or API endpoints for profile updates) and check for the presence of anti-CSRF tokens in request headers or form fields. Use browser developer tools or curl to examine requests to the profile update endpointAffected if No anti-CSRF token (synchronizer token) is required or validated for state-changing profile operations
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Check SameSite cookie attributesExamine the authentication cookies set by Squidex/IdentityServer using browser developer tools (Application > Cookies) or by inspecting Set-Cookie headers in HTTP responsesAffected if Authentication cookies have SameSite=None or no SameSite attribute set, or SameSite=Lax without proper CSRF token validation
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Validate Origin/Referer header checksReview the IdentityServer configuration or source code for server-side validation of Origin and Referer headers on state-changing POST/PUT/DELETE requests to profile endpointsAffected if The application does not validate Origin or Referer headers before processing profile changes
You are affected if running Squidex CMS version 7.21.0 or earlier AND the IdentityServer account profile endpoint lacks anti-CSRF token protection, proper SameSite cookie attributes, and Origin/Referer header validation.
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 dataImplement anti-CSRF tokens (synchronizer token pattern) on the IdentityServer account profile endpoint and other state-changing operations, configure SameSite cookie attributes, and validate Origin/Referer headers to prevent forged requests.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-31016 — 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-2026-31016 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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