CVE-2026-24983
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 · uneditedImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in UpSolution UpSolution Core us-core allows Reflected XSS.This issue affects UpSolution Core: from n/a through <= 8.41.
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 confidenceReflected XSS vulnerability in UpSolution Core us-core allows attackers to inject malicious scripts through unsanitized user input that gets reflected in web pages. The vulnerability exists in the web page generation process where URL parameters are not properly validated before being output.
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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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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Identify if UpSolution Core is installedSearch the web server file system for the 'us-core' directory or files containing 'UpSolution Core' references. Check common WordPress plugin/theme directories, or if us-core is a standalone component, check the application's includes/plugins folders.Affected if The us-core component is found on the server
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Determine the installed version of us-coreLocate a version file (such as version.php, readme.txt, or a changelog file) within the us-core directory. Alternatively, check the main us-core PHP file for a version constant or variable definition.Affected if The discovered version is unknown, unpatched, or within a vulnerable range
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Verify web application exposes URL parameter reflectionAccess a page generated by us-core and inspect the HTML source. Append a test parameter (e.g., ?test=xss) to the URL and check if this value appears in the rendered page source without encoding.Affected if URL parameter values are reflected directly into HTML output without encoding or sanitization
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Test for reflected XSS in URL parametersUsing a browser or HTTP tool, submit a harmless XSS probe string (e.g., ?param=<script>alert(1)</script>) to pages served by us-core. Inspect the response to see if the script tags are rendered literally in the HTML.Affected if The injected script tags or encoded variants appear in the page response unescaped
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Check if input validation is implementedExamine us-core PHP source files for the presence of input validation functions (htmlspecialchars, filter_var, esc_attr, or custom sanitization) when handling request parameters before output.Affected if No input validation or output encoding functions are found around $_GET, $_POST, or $_REQUEST superglobals used in page generation
A system is affected if UpSolution Core (us-core) is installed and URL parameters are reflected in web pages without proper sanitization or 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 dataImplement proper input validation and output encoding for all user-supplied data. Use context-appropriate escaping functions when rendering data in HTML. Consider implementing Content Security Policy headers as an additional defense layer.
- 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-2026-24983 — 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-2026-24983 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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- Version or environment caveats, and links to real fixes
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