Threats Tagged 'cve-2026-77999'
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Threats Tagged 'cve-2026-77999'
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CVE-2026-77999: CWE-472: External Control of Assumed-Immutable Web Parameter in j2commerce.com J2Store extension for JoomlaCVE-2026-77999 0 Joomla Extension - j2commerce.com - Unauthenticated PayPal callback forgery leading to order confirmation fraud in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - The PayPal IPN listener's signature check (`_validateIPN()`) accepted `UNVERIFIED` and any non-`INVALID` response as valid, made its verification request with `CURLOPT_SSL_VERIFYPEER` disabled, and stored its verdict in a field nothing downstream ever checked — so processing continued regardless of the outcome. Separately, the paid-amount comparison only ran when `mc_gross` was a positive number; omitting the field from the POST body (`floatval(null) == 0`) skipped the check entirely. Combined with a merchant-configured `receiver_email` and a sequential, enumerable order id read from the `custom` field, an anonymous POST was enough to move a pending order straight to `CONFIRMED` with no payment, or force another customer's pending order to `FAILED`. `paypalv2.php` performed no amount check under any circumstances. Join the discussion | CVE Database V5 | 09/03/2026, 11:58:00 UTC Added: 09/03/2026, 12:07:51 UTC |
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