Electronic Signature Add-on for Fluent Forms IDOR Authorization Bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The WP E-Signature Electronic Signature Add-on for Fluent Forms WordPress plugin has an insecure direct object reference flaw classified as CWE-639, Authorization Bypass Through User-Controlled Key. It is tracked as CVE-2026-110383 and GHSA-pjjv-c28j-37gf and affects versions from n/a through 2.0.5. The attack vector is network, with low complexity, no privileges and no user interaction, and the CVSS 3.1 base score is 7.5 (HIGH) with high confidentiality impact. CISA has not added it to KEV, and its SSVC rates exploitation as none and automatable as yes.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
Authorization Bypass Through User-Controlled Key vulnerability in WP E-Signature Electronic Signature Add-on for Fluent Forms signature-fluent-contract-forms-add-on allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Electronic Signature Add-on for Fluent Forms: from n/a through 2.0.5.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WP E-Signature | Electronic Signature Add-on for Fluent Forms | up to 2.0.5 | — | No fix listed | CNA |
- Electronic Signature Add-on for Fluent Forms VendorWP E-Signature Affected up to 2.0.5 Fixed in — No fix listed CNA
Remediation
No fixed version is listed for this add-on, so versions from n/a through 2.0.5 remain affected until WP E-Signature publishes a fix. Check the vendor's advisory for updates.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-18 Threatist record created from CVE-2026-110383
- 2026-10-18 Alias added: GHSA-pjjv-c28j-37gf
More WP E-Signature vulnerabilities
- TI-2026-37819 WordPress Signature Add-On for WooCommerce plugin <= 2.0 - Sensitive Data Exposure vulnerability CVSS 3.1HIGH 7.5
- TI-2026-74901 Ninja Forms Signature Contract Add-On for WordPress: Broken Access Control CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-110383 · CVE Program
- CVE-2026-110383 · NVD
- FIRST EPSS
- GHSA-pjjv-c28j-37gf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences