CVE-2026-8611
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
The Klamra Paycal for Aspaclaria WordPress plugin up to version 1.1.4 is vulnerable to Insecure Direct Object Reference (IDOR) via the 'invoice_id' parameter. Authenticated attackers with subscriber-level access can download arbitrary customer invoices by enumerating sequential post IDs.
Risk Assessment
Attackers can obtain sensitive PII of other customers, including full name, email, phone number, order total, line items, and customer notes, violating privacy and potentially leading to identity theft.
Recommendation
Update the plugin to the latest version that fixes this vulnerability. Restrict invoice access to authorized users only.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

