Cross Site Scripting Vulnerability in WebSystems WebTOTUM 2026 Calendar Component
CVE-2026-6743

5.1MEDIUM

Key Information:

Vendor

Websystems

Status
Webtotum
Vendor
CVE Published:
21 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6743?

A cross site scripting vulnerability was identified in the Calendar component of WebSystems WebTOTUM 2026. This issue allows attackers to execute malicious scripts in the context of the user's session, potentially leading to data theft or session hijacking. The attack can be initiated remotely, making it particularly dangerous for users. Immediate actions include upgrading the affected component to the latest version, which addresses this security flaw. The vendor has acted promptly by releasing a fix after being made aware of the vulnerability.

Affected Version(s)

WebTOTUM 2026

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-2026-6743 - Proof of Concept

References

https://vuldb.com/vuln/358434
vdb-entry
https://vuldb.com/vuln/358434/cti
signaturepermissions-required
https://vuldb.com/submit/794617
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andrea Intilangelo
acme (VulDB User)
acme (VulDB User)
VulDB CNA Team
.