CVE-2026-25369
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 flexmls Flexmls® IDX flexmls-idx allows Reflected XSS.This issue affects Flexmls® IDX: from n/a through <= 3.15.9.
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 flexmls Flexmls® IDX plugin (versions up to 3.15.9) where user-supplied input is not properly sanitized before being rendered in web pages, allowing injection of malicious JavaScript through unsanitized parameters.
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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Locate the flexmls IDX plugin versionNavigate to WordPress admin > Plugins > Installed Plugins and locate 'Flexmls IDX' in the plugin list. The version number is displayed below the plugin name.Affected if The displayed version is 3.15.9 or earlier (any version below 3.15.10)
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Verify plugin version from plugin filesAccess the plugin directory via FTP or file manager, open the main plugin file (typically flexmls-idx.php) or readme.txt, and locate the 'Version' header or changelog entry.Affected if The version header shows 3.15.9 or lower, confirming the unpatched version is installed.
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Confirm the plugin is activeIn WordPress admin > Plugins, verify the flexmls IDX plugin shows as 'Active' rather than 'Inactive' or 'Must-Use'.Affected if The plugin is active and running a vulnerable version, making the XSS flaw exploitable.
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Inspect for unsanitized URL parameters in useUse browser developer tools or a proxy to examine HTTP requests sent to pages containing the flexmls IDX plugin. Look for query parameters (such as search strings, filter values, or IDX parameters) that accept user input and are reflected in the page response without visible encoding.Affected if Any user-supplied parameter from the plugin is reflected in the HTML response without proper sanitization, indicating the XSS vulnerability is present.
You are affected if the flexmls IDX plugin is active and the installed version is 3.15.9 or earlier, since versions prior to 3.15.10 contain the unsanitized input flaw that enables reflected XSS.
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 version 3.15.10 or later where the vulnerability is patched. Implement proper input validation and output encoding for all user-supplied data before rendering in HTML contexts.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-25369 — 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-2026-25369 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
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