Vulnerability Description
The Klamra Paycal for Aspaclaria plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.1.4 via the 'invoice_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to download arbitrary customer invoices by enumerating sequential post IDs, exposing sensitive billing PII including full name, email address, phone number, order total, line items, and customer notes belonging to other customers.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.0
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.0
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.0
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.1
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.1
- https://plugins.trac.wordpress.org/browser/klamra-paycal-for-aspaclaria/tags/1.1
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b07dc6ff-f88d-4c5a-8cd
FAQ
What is CVE-2026-8611?
CVE-2026-8611 is a vulnerability with a CVSS score of 4.3 (MEDIUM). The Klamra Paycal for Aspaclaria plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.1.4 via the 'invoice_id' parameter due to missing valida...
How severe is CVE-2026-8611?
CVE-2026-8611 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8611?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.