What’s Vulnerable › Vulnerabilities

CVE-2026-103540: formtools.org Form Tools Client Settings Clients.class.php updateClientSettingsTab special elements in template engine

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-01 · updated 2026-10-01
• Weakness: CWE-791

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 products

• formtools.org Form Tools: 3.1.0, 3.1.1

References

• https://github.com/formtools/core/issues/956
• https://github.com/wawyw/cve_report/blob/main/formtools_1.md
• https://vuldb.com/cve/CVE-2026-103540
• https://vuldb.com/submit/957845
• https://vuldb.com/vuln/412350
• https://vuldb.com/vuln/412350/cti

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