WordPress plugin

Electronic Signature Add-on for Fluent Forms <= 2.0.5 — Unauthenticated Insecure Direct Object Reference

CVE-2026-110383Published Oct 16, 2026 · Updated Nov 13, 2026

Affected: ≤2.0.5Update to 2.0.6 or newer

All remediation steps

Watch plugin

Severity

Medium5.3

CVSS

5.3

CVSS 3.1 · CNA (Wordfence)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:N Privileges required: None
UI:N User interaction: None
S:U Scope: Unchanged
C:N Confidentiality: None
I:L Integrity: Low
A:N Availability: None

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

Required access

No account needed

Exploit prediction (EPSS)

0.3% chance in 30 days22th percentile

CISA KEV

Not listed

On this page7

Am I affected?

Electronic Signature Add-on for Fluent Forms signature-fluent-contract-forms-add-on

Affected≤ 2.0.5
Patched in2.0.6

You are affected if you run ≤ 2.0.5. Version 2.0.6 and later are not affected by this issue.

Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Electronic Signature Add-on for Fluent Forms.
No admin access? Run a passive check of your site. It reads public files only.
No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

Update to version 2.0.6, or a newer patched version
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
Watch Electronic Signature Add-on for Fluent Forms to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Oly Hossen.

The Electronic Signature Add-on for Fluent Forms plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.5. This is due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform an unauthorized action.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

Advisorywordfence.com

Timeline

Oct 16, 2026
CVE published
Severity medium, CVSS 5.3
Nov 13, 2026
Record last updated

Sources & licenses

Wordfence record

Vulnerability data: Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers: Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE: National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS: Exploit Prediction Scoring System by FIRST.org.

How we use these sources