CVE-2024-58321
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 vulnerability in Kentico Xperience allows attackers to inject malicious scripts via form validation rule configuration. Attackers can exploit this vulnerability to execute malicious scripts that will run in users' 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 confidenceA stored cross-site scripting vulnerability in Kentico Xperience allows attackers to inject malicious JavaScript via form validation rule configuration. The malicious payload is persisted and executes when users view or interact with forms containing the compromised validation rules.
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<= 13.0.159CVSS 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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Check Kentico Xperience versionLog into the Kentico administration interface and navigate to the 'About' page (usually under Help or Settings), or check the version in the ~/bin/CMS.dll file properties, or look for version info in the web.config or a Version.txt file in the application root.Affected if The installed version is 13.0.159 or lower.
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Identify forms using custom validation rulesIn the Kentico admin panel, go to the Forms application or Page type form builder. Look for any forms that have custom validation rules configured. Note the names and locations of these forms.Affected if Any forms exist with custom validation rules defined.
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Inspect validation rule configurations for suspicious contentAccess the validation rule settings for identified forms. Examine each validation rule's configuration, looking at rule name, error message, and any parameters. Check for unusual script tags, javascript: URLs, or encoded payloads.Affected if Any validation rule contains script tags, event handlers (onclick, onerror, etc.), or JavaScript code in its configuration fields.
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Query the database for malicious validation entriesIf direct admin access is limited, query the Kentico database (typically tables prefixed with CMS_Form or similar, such as CMS_FormValidationRule or CMS_FormField). Look for XSS patterns in validation-related columns using a query like: SELECT * FROM CMS_FormValidationRule WHERE ValidationRuleName LIKE '%<script%' OR ValidationErrorMessage LIKE '%<script%'Affected if Any records in the database contain script tags or XSS payloads in validation rule fields.
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Review recent admin activity logsCheck Kentico event log or audit logs for any suspicious activity around form validation rule creation or modification, especially from unexpected user accounts or IP addresses.Affected if There are unexpected modifications to form validation rules in the logs.
You are affected if running Kentico Xperience version 13.0.159 or lower AND any forms in your system contain custom validation rules with injected script content in their configuration.
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 dataApply contextual output encoding to all form validation rule inputs/outputs and implement strict input validation on the server side. Update to the vendor patch when available.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-58321 — 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-2024-58321 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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