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Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-40765

HIGH · 7.1 CVSS v3.1 Published 2026-06-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable No privileges

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 · unedited
Unauthenticated Cross Site Scripting (XSS) in collectchat <= 2.4.9 versions.

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 confidence

An unauthenticated Cross Site Scripting (XSS) vulnerability exists in the collectchat WordPress plugin versions 2.4.9 and below. The vulnerability allows attackers to inject malicious JavaScript code through unsanitized user inputs without requiring authentication.

MitigationUpgrade collectchat to the latest version available from the vendor, or implement output encoding and input validation on all user-supplied data handled by the plugin.

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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify collectchat plugin is installed
    Check WordPress plugins directory (wp-content/plugins/) for collectchat folder, or view installed plugins in WordPress admin under Plugins > Installed Plugins
    Affected if collectchat plugin is present in the WordPress installation
  2. Determine installed version number
    Open the main plugin file (usually collectchat.php) in wp-content/plugins/collectchat/ and locate the version comment or header, or check the plugin's readme.txt file for the Version field
    Affected if version cannot be determined or is 2.4.9 or lower
  3. Compare version against affected range
    Compare the installed version number to the affected range: version 2.4.9 and below
    Affected if installed version is 2.4.9 or lower, indicating the plugin contains the unsanitized input vulnerability
  4. Confirm XSS attack vector exposure
    Identify if the plugin's chat widget or user input forms are publicly accessible without authentication - the vulnerability exploits unsanitized user inputs in these fields
    Affected if chat collectchat widget is exposed to unauthenticated users on the site

User is affected if the collectchat WordPress plugin version 2.4.9 or below is installed and the chat widget is accessible to unauthenticated visitors, as the unsanitized input fields allow JavaScript injection.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade collectchat to the latest version available from the vendor, or implement output encoding and input validation on all user-supplied data handled by the plugin.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-40765 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data