CVE-2026-108568— InstantSoft icms2 Billing paypal.php validatePaypalOrder data authenticity
Quick assessment
Affected
InstantSoft icms2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 InstantSoft icms2 版本 2.18.2 及更早版本中发现了一个安全漏洞。受影响的是计费模块（Billing Module）中 文件内的 函数。通过操控参数 或 ，可导致对数据真实性的验证不充分。该漏洞支持远程攻击。相关漏洞利用代码已公开披露，并可被实际利用。厂商在漏洞披露前已被联系，但对此未作任何回应。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| InstantSoft | icms2 | 2.18.0 |
affected |
2.18.1 |
affected | ||
2.18.2 |
affected |
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I. Basic Information for CVE-2026-108568
Vulnerability Information
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Vulnerability Title
InstantSoft icms2 Billing paypal.php validatePaypalOrder data authenticity
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| InstantSoft | icms2 | 2.18.0 |
cpe:2.3:a:instantsoft:icms2:*:*:*:*:*:*:*:*
|
|
II. Public POCs for CVE-2026-108568
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · InstantSoft · 2026-10-11 · 3 CVEs total
| CVE-2026-108567 | 4.3 MEDIUM | InstantSoft icms2 Image image.php files_delete_file path traversal |
| CVE-2026-108566 | 3.5 LOW | InstantSoft icms2 Private Message index.tpl.php index cross site scripting |
IV. Related Vulnerabilities
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-
CVE-2026-108567
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CVE-2026-108566
InstantSoft icms2 Private Message index.tpl.php index cross -
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Same vendor: InstantSoft
-
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InstantSoft icms2 Image image.php files_delete_file path tra -
CVE-2026-108566
InstantSoft icms2 Private Message index.tpl.php index cross -
CVE-2026-48707
InstantCMS vulnerable to SSRF via upload redirect bypass all -
CVE-2026-54611
InstantCMS has Remote Code Execution in package installer -
CVE-2026-28281
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Same weakness: CWE-345
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V. Comments for CVE-2026-108568
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