dbcve.org
WxsyncWordPress extension · Tencent

CVE-2023-39988

MEDIUM · 5.4 CVSS v3.1 Published 2023-09-04
Fix available
A fix is available. Upgrade to after 2.7.23 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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
Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in 标准云(std.Cloud) WxSync plugin <= 2.7.23 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

Stored Cross-Site Scripting (XSS) vulnerability in the 标准云(std.Cloud) WxSync plugin versions 2.7.23 and below. An authenticated attacker with contributor-level access or higher can inject malicious JavaScript code that persists on the server and executes when other users view the affected content.

MitigationUpdate the WxSync plugin to a version newer than 2.7.23. Until a patch is available, implement proper input validation and output encoding on all user-supplied data fields within the plugin.

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
WxsyncWordPress extension
Affected:<= 2.7.23

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
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 checks

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

  1. Verify WxSync plugin is installed
    Check your site's plugin directory or administration panel for the Tencent Wxsync (标准云/std.Cloud WxSync) plugin. This is typically found under /wp-content/plugins/ or through the WordPress admin interface under Plugins.
    Affected if The Wxsync plugin appears in your installed plugins list
  2. Identify the installed WxSync version
    Locate the plugin version number in the plugin header comment within the main plugin file (commonly named wxsync.php or similar in the plugin directory), or check the version field in the plugin's readme.txt file.
    Affected if The version number displayed is 2.7.23 or lower
  3. Confirm contributor-level user access exists
    Review your user role permissions and existing user accounts. Check if any users have the Contributor role or higher, as this vulnerability can be exploited by authenticated users with these privilege levels.
    Affected if There are one or more user accounts with Contributor, Author, Editor, or Administrator roles who can access the Wxsync plugin functionality
  4. Inspect WxSync content input fields
    Access the Wxsync plugin administrative interface and identify fields where users can input or sync content, such as WeChat message templates, sync configurations, or content synchronization settings.
    Affected if The plugin exposes input fields that accept user-supplied content and store it for display to other users
  5. Review stored content for malicious scripts
    Examine the database tables where Wxsync stores synchronized content or message data. Look for HTML script tags, javascript: URIs, or event handler attributes (onload, onerror, onclick, etc.) in fields that should contain plain text.
    Affected if Database records in Wxsync-related tables contain unencoded HTML or JavaScript code in fields that should only contain text
  6. Check browser console for XSS indicators
    Log in as a non-admin user with Contributor access, navigate to pages displaying Wxsync-synchronized content, and open the browser developer console. Look for console errors or unexpected script executions.
    Affected if JavaScript code executes or console errors appear when viewing Wxsync-synced content without directly including the script in the page source

Your environment is affected if the WxSync plugin version is 2.7.23 or lower and contributor-level users can access the plugin's content input features, allowing stored malicious scripts to execute when other users view the synced content.

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
Upgrade available Upgrade to a release after 2.7.23
Interim mitigation

Update the WxSync plugin to a version newer than 2.7.23. Until a patch is available, implement proper input validation and output encoding on all user-supplied data fields within the plugin.

Fix this in Wxsync Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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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-2023-39988 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