VDB-416225 · Submit #954261 · CVE-2026-108568

InstantSoft icms2 up to 2.18.2 Billing paypal.php validatePaypalOrder bid/sig data authenticity

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	1.75+

Summaryinfo

A vulnerability was found in InstantSoft icms2 up to 2.18.2. It has been classified as problematic. The impacted element is the function validatePaypalOrder of the file system/controllers/billing/actions/paypal.php of the component Billing Module. The manipulation of the argument bid/sig leads to data authenticity. This vulnerability is referenced as CVE-2026-108568. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in InstantSoft icms2 up to 2.18.2. This issue affects the function validatePaypalOrder of the file system/controllers/billing/actions/paypal.php of the component Billing Module. The manipulation of the argument bid/sig with an unknown input leads to a data authenticity vulnerability. Using CWE to declare the problem leads to CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. Impacted is integrity.

The identification of this vulnerability is CVE-2026-108568. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known.

It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. By approaching the search of inurl:system/controllers/billing/actions/paypal.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Content Management System

Vendor

InstantSoft

Name

icms2

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Data authenticity
CWE: CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/10/2026 Advisory disclosed
10/10/2026 +0 days VulDB entry created
10/10/2026 +0 days VulDB entry last update

Sourcesinfo

Status: Confirmed

CVE: CVE-2026-108568 (🔒)
GCVE (CVE): GCVE-0-2026-108568
GCVE (VulDB): GCVE-100-416225
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/10/2026 17:09
Changes: 10/10/2026 17:09 (56)
Complete: 🔍
Submitter: EVIL0RD
Cache ID: 216::103

Submitinfo

Accepted

Submit #954261: InstantCMS InstantCMS icms2 2.18.2 Insufficient Verification of Data Authenticity (by EVIL0RD)