What is CVE-2026-103541?

CVE-2026-103541 is a medium-severity vulnerability in Formtools.org Form Tools, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-10-01.

How severe is CVE-2026-103541?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Arbitrary file upload in Formtools.org Form Tools

CVE-2026-103541

A vulnerability was detected in formtools.org Form Tools up to 3.1.1. This issue affects the function Files::uploadFile of the file global/code/actions.php of the component Ajax Handler. The manipulation results in unrestricted upload. It is possible to launch the attack remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Published 2026-10-01 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Formtools.org Form Tools — versions 3.1.0, 3.1.1

Weakness classification (CWE)

References

vuldb.com/vuln/412351 (technical-description, vdb-entry)
vuldb.com/vuln/412351/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-103541 (third-party-advisory)
vuldb.com/submit/957902 (third-party-advisory)
github.com/formtools/core/issues/957 (issue-tracking)
github.com/wawyw/cve_report/blob/main/formtools_2.md (exploit)

Frequently asked questions

What is CVE-2026-103541?: CVE-2026-103541 is a medium-severity vulnerability in Formtools.org Form Tools, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-10-01.
How severe is CVE-2026-103541?: Medium severity. CVSS v3 base score is 6.3 out of 10.