CVE-2026-103540

formtools.org Form Tools Client Settings Clients.class.php updateClientSettingsTab special elements in template engine

MEDIUM
6.3
CVSS Score
Published: October 1, 2026 at 05:15 AM UTC
Updated: October 1, 2026 at 08:17 PM UTC
2 products affected across 2 vendorsForm ToolsForm Tools

Using Form Tools by formtools.org?

Get instant alerts when new vulnerabilities affect Form Tools - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.3
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

A security vulnerability has been detected in formtools.org Form Tools up to 3.1.1. This vulnerability affects the function Clients::updateClientSettingsTab of the file global/code/Clients.class.php of the component Client Settings. The manipulation of the argument page_titles leads to improper neutralization of special elements used in a template engine. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/412350
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/412350/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-103540
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/957845
Issue Tracking
Source: cverecord
https://github.com/formtools/core/issues/956

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1336CWE-791

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card