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2.1

InstantSoft icms2 allows forged PayPal billing data

CVE-2026-108568 · published 7 days ago
Summary

The billing module in InstantSoft icms2 (up to version 2.18.2) does not properly verify certain PayPal request parameters, so a remote attacker could trick the system into accepting false payment information. This could lead to unauthorized orders or financial loss. Apply the vendor's patch or update to a newer version and review PayPal integration settings to ensure proper validation.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
instantsoft icms2 2.18.0
Original advisory text
InstantSoft icms2 Billing paypal.php validatePaypalOrder data authenticity
A vulnerability was determined in InstantSoft icms2 up to 2.18.2. The affected element is the function validatePaypalOrder of the file system/controllers/billing/actions/paypal.php of the component Billing Module. Executing a manipulation of the argument bid/sig can lead to insufficient verification of data authenticity. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
2.1 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-345Insufficient Verification of Data Authenticity
Timeline
Published11 Oct 2026
Updated13 Oct 2026
First seen11 Oct 2026
Sources
CVE-2026-108568 · NVD
CVE-2026-108568 · MITRE
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