Template Injection Vulnerability in Sanluan PublicCMS
CVE-2026-8740

5.3MEDIUM

Key Information:

Vendor

Sanluan

Status
Publiccms
Vendor
CVE Published:
17 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8740?

A vulnerability has been identified in Sanluan PublicCMS 5.202506.d, specifically in the templateResult API's execute function. This flaw arises from the inadequate handling of special elements within a template engine, leading to potential template injection attacks. As a result, remote attackers may manipulate the argument templateContent, which compromises the integrity of web applications utilizing this CMS. Efforts to notify the vendor regarding this issue have gone unanswered, leaving users at risk. More information and potential exploits are publicly available.

Affected Version(s)

PublicCMS 5.202506.d

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-8740 - Proof of Concept

References

https://vuldb.com/vuln/364328
vdb-entrytechnical-description
https://vuldb.com/vuln/364328/cti
signaturepermissions-required
https://vuldb.com/submit/809932
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

vulnplusbot (VulDB User)
VulDB CNA Team
.