CVE-2026-42686
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 · uneditedSubscriber Cross Site Scripting (XSS) in EventPrime <= 4.3.2.1 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 · high confidenceAuthenticated Cross-Site Scripting (XSS) vulnerability in the EventPrime WordPress plugin allows users with Subscriber-level privileges to inject malicious scripts through unsanitized input fields. The vulnerability affects all versions up to and including 4.3.2.1, and can be exploited by low-privileged authenticated users to execute arbitrary JavaScript in the context of other users' browsers.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
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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Confirm EventPrime plugin is installedNavigate to WordPress admin dashboard > Plugins > Installed Plugins and look for 'EventPrime' or 'Event Prime' in the plugin list. Alternatively, check the /wp-content/plugins/ directory for an 'eventprime' folder.Affected if EventPrime plugin exists in the WordPress installation
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Identify installed EventPrime versionIn WordPress admin > Plugins > Installed Plugins, locate EventPrime and view the version number displayed below the plugin name. Alternatively, check the 'version' field in the plugin's main PHP file header or in readme.txt.Affected if Version is 4.3.2.1 or lower (any version up to and including 4.3.2.1)
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Check if new user registration is enabledIn WordPress admin > Settings > General, verify if 'Membership' is checked to allow anyone to register. Also check if the 'New Role' default is set to Subscriber.Affected if Anyone can register as a Subscriber, or Subscribers can be created in the system
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Review subscriber role capabilitiesIn WordPress admin > Users > Roles, examine the Subscriber role permissions. Check if the plugin allows subscribers to access event-related input forms or booking features.Affected if Subscriber role has access to EventPrime functionality that accepts user input
A user is affected if EventPrime version 4.3.2.1 or lower is installed AND Subscriber-level accounts can be created or already exist in the WordPress environment.
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 dataUpdate EventPrime to the latest patched version immediately. As a temporary workaround, disable new subscriber registrations and review plugin settings to restrict subscriber capabilities until the patch is applied.
- Consultation2.0 h
- Implementation1.0 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-2026-42686 — 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-2026-42686 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
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data