CVE-2025-51503
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 Microweber CMS 2.0 allows attackers to inject malicious scripts into user profile fields, leading to arbitrary JavaScript execution in admin browsers.
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 Microweber CMS 2.0 allows injection of malicious scripts through user profile fields. When administrators view these profile fields, the embedded JavaScript executes in their browser session, potentially enabling session hijacking or administrative actions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2.0.0CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
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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Confirm Microweber CMS installationIdentify if Microweber CMS is running in your environment by checking for its characteristic file structure, database tables, or admin panel access at your web root.Affected if Microweber CMS is present and accessible in your environment
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Check installed Microweber versionLocate the version file or admin dashboard 'About' section to determine the exact Microweber version number. Common locations include a version.php file, composer.json, or the admin backend system information page.Affected if The installed version is exactly 2.0.0 (note the '=' indicates this specific version only)
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Identify user profile functionalityAccess the user profile editing interface in Microweber - typically found in the admin panel under 'Users', 'Profile', or 'My Account' sections. Locate fields that accept user input such as display name, bio, avatar description, or custom profile attributes.Affected if User-editable profile fields exist and are accessible to non-admin users
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Verify lack of output encoding in admin viewsAs a non-admin user, inject a benign test payload (such as <script>alert('XSS')</script> or <img src=x onerror=alert(1)>) into a profile field, then log in as an administrator and view that user's profile to observe if the script executes in the admin session.Affected if The injected script executes when an administrator views the profile, indicating stored XSS is present
Your environment is affected if you are running Microweber version 2.0.0 and have non-admin user accounts with access to profile fields that are rendered without encoding in the admin dashboard.
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 strict input validation and output encoding for all user profile fields. Sanitize or escape HTML/script tags before storage and before rendering in admin views.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-51503 — 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-2025-51503 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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