dbcve.org
Event Rsvp And Simple Event ManagementWordPress extension · Emarketdesign

CVE-2025-5540

MEDIUM · 5.4 CVSS v3.1 Published 2025-06-26
Fix available
A fix is available. Upgrade to after 4.1.0 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
The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'emd_mb_meta' shortcode in all versions up to, and including, 4.1.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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 · high confidence

Stored Cross-Site Scripting vulnerability in the Event RSVP and Simple Event Management Plugin for WordPress. The emd_mb_meta shortcode fails to properly sanitize user-supplied attributes and escape output, allowing authenticated contributors+ to inject arbitrary JavaScript that executes when users view affected pages.

MitigationUpdate to a patched version once available, or modify the shortcode handler to apply proper input sanitization (such as sanitize_text_field) and output escaping (such as esc_attr or esc_html) on all user-supplied attributes before rendering.

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
Event Rsvp And Simple Event ManagementWordPress extension
Affected:<= 4.1.0

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. Confirm the plugin is installed and active
    Navigate to WordPress admin Plugins page and verify 'Emarketdesign Event Rsvp And Simple Event Management' is installed and activated
    Affected if The plugin is present and active in the WordPress installation
  2. Check the installed plugin version
    In WordPress admin Plugins page, click on the plugin details to view the installed version number. Compare it to the affected range: <= 4.1.0
    Affected if The installed version number is 4.1.0 or lower
  3. Identify pages using the emd_mb_meta shortcode
    Search the WordPress database or use a plugin to find all posts/pages containing the shortcode [emd_mb_meta] in the content
    Affected if The shortcode is present in any published content
  4. Verify contributor or higher user roles exist
    In WordPress admin, go to Users > All Users and review the assigned roles. Check if any users have Contributor, Author, Editor, or Administrator roles
    Affected if There are users with Contributor or higher access who could potentially add or edit content containing the shortcode

You are affected if the plugin is installed with version 4.1.0 or lower AND your site has content using the emd_mb_meta shortcode AND users with Contributor-level or higher access exist on the site.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 4.1.0
Interim mitigation

Update to a patched version once available, or modify the shortcode handler to apply proper input sanitization (such as sanitize_text_field) and output escaping (such as esc_attr or esc_html) on all user-supplied attributes before rendering.

Recommended fix Moderate confidence

4.1.1 or latest available version

  1. Navigate to the WordPress admin dashboard
  2. Go to Plugins > Installed Plugins
  3. Find 'Event RSVP and Simple Event Management' plugin
  4. Click 'Update Now' if an update is available, or manually download the latest version from WordPress.org and upload it
  5. After updating, verify the plugin is running version 4.1.1 or higher

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Event Rsvp And Simple Event Management 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
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

Scan for this in your stack

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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-2025-5540 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