CVE-2026-56831
mediumShopper is a Headless e-commerce Admin Panel.
Shopper is a Headless e-commerce Admin Panel. Prior to 2.9.0, the /cpanel/discounts administrative interface accepts negative fixed_amount discount values, persists them in sh_discounts, and passes them through vendor/shopper/cart/src/Discounts/DiscountCalculator.php and vendor/shopper/cart/src/Pipelines/Calculate.php without enforcing a positive-value invariant. Because the calculation subtracts discountTotal from the subtotal, a negative discount increases the resulting order total instead of reducing it. Malformed discount records can therefore cause incorrect pricing and financial data integrity failures, although the advisory does not establish a customer-facing exploitation path. This issue is fixed in version 2.9.0.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/shopperlabs/shopper/commit/967e616281ded1a0050d9102858ecd7dd7f66a41 security-advisories@github.com
- https://github.com/shopperlabs/shopper/pull/528 security-advisories@github.com
- https://github.com/shopperlabs/shopper/releases/tag/v2.9.0 security-advisories@github.com
- https://github.com/shopperlabs/shopper/security/advisories/GHSA-5vf4-452p-jjhf security-advisories@github.com
- https://github.com/shopperlabs/shopper/security/advisories/GHSA-5vf4-452p-jjhf 134c704f-9b21-4f2e-91b3-4a467353bcc0