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TI-2026-82322 Aliases CVE-2026-91152GHSA-883r-xqxq-wq5r

Reflected cross-site scripting in Everest Forms via evf_toast_type

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Everest Forms Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress, in all versions up to and including 3.6.2, does not sanitize or escape the evf_toast_type parameter, which is a reflected cross-site scripting flaw (CWE-79). An unauthenticated attacker can inject arbitrary web script that runs in a user's browser if the user is tricked into clicking a crafted link. Exploitation also requires the sibling evf_toast parameter to decode successfully via atob().

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'evf_toast_type' parameter in all versions up to, and including, 3.6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the sibling evf_toast parameter to decode successfully via atob(), but this is a trivially attacker-controlled prerequisite.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00346 28th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wpeverestEverest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AIup to 3.6.2—No fix listedCNA
  • Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI Vendorwpeverest Affected up to 3.6.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Everest Forms (Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-91152
  2. 2026-10-29 CISA SSVC decision points changed
  3. 2026-10-29 Priority changed: MEDIUM → LOW
  4. 2026-10-29 Alias added: GHSA-883r-xqxq-wq5r

References

Other 5

  • TI-2025-00958 Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion CVSS 3.1CRITICAL 9.8
  • TI-2026-02850 Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field CVSS 3.1CRITICAL 9.8
  • TI-2026-01188 User Registration & Membership <= 5.1.2 - Unauthenticated Privilege Escalation via Membership Registration CVSS 3.1CRITICAL 9.8
  • TI-2025-02262 User Registration & Membership < 4.1.3 - Authentication Bypass CVSS 3.1HIGH 8.1
  • TI-2025-02232 User Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation CVSS 3.1HIGH 8.1
  • TI-2022-03588 User Registration < 2.2.4.1 - Subscriber+ Arbitrary File Upload CVSS 3.1HIGH 7.5
See all 80 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences