CVE-2023-2407 — The Event Registration Calendar By vcita plugin, versions up to and including 3

The Event Registration Calendar By vcita plugin, versions up to and including 3.10.0, and Online Payments – Get Paid with PayPal, Square & Stripe plugin, for WordPress are vulnerable to Cross-Site Request Forgery. This is due to missing nonce validation in the ls_parse_vcita_

01What is this vulnerability?

The Event Registration Calendar By vcita plugin, versions up to and including 3.10.0, and Online Payments – Get Paid with PayPal, Square & Stripe plugin, for WordPress are vulnerable to Cross-Site Request Forgery. This is due to missing nonce validation in the ls_parse_vcita_callback() function. This makes it possible for unauthenticated attackers to modify the plugin's settings and inject…

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-03T05:15:09.780
• Last modified: 2026-04-08T17:16:55.923

09References

• blog.jonh.eu — https://blog.jonh.eu/blog/security-vulnerabilities-in-wordpress-plugins-by-vcita
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/browser/event-registration-calendar-by-vcita/…
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/browser/paypal-payment-button-by-vcita/trunk/…
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new…
• www.wordfence.com — https://www.wordfence.com/threat-intel/vulnerabilities/id/207b40fa-2062-48d6-990…
• blog.jonh.eu — https://blog.jonh.eu/blog/security-vulnerabilities-in-wordpress-plugins-by-vcita
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/browser/event-registration-calendar-by-vcita/…
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/browser/paypal-payment-button-by-vcita/trunk/…
• www.wordfence.com — https://www.wordfence.com/threat-intel/vulnerabilities/id/207b40fa-2062-48d6-990…