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Gravity Forms <= 2.7.3 — Unauthenticated PHP Object Injection

CVE-2023-28782Published · Updated

Action summary

Affected: ≤2.7.3Update to 2.7.4 or newer

All remediation steps
Watch plugin
Critical9.8CVSS 3.19.8CISA KEVNot listedAccessNo account needed
On this page3

Overview

Advisory ID
CVE-2023-28782
Product
Gravity Forms gravityforms
Affected
≤2.7.3
Fixed in
2.7.4
Required access
No account needed
Published
· updated
Credit
Rafie Muhammad
  1. Affected≤ 2.7.3
  2. Patched in2.7.4

Update to 2.7.4 or newer.

9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:H Confidentiality
High
I:H Integrity
High
A:H Availability
High

The Gravity Forms plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.7.3 via deserialization of untrusted input in the get_field_input function. This allows unauthenticated attackers to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

Not sure which version you run? Run a passive check — it reads public files only.

Remediation & mitigations

  1. Update to version 2.7.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.

References & provenance

Proof-of-concept & detection

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

Advisories & patches

Related CVEs

More vulnerabilities in Gravity Forms
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Post Excerpt / Post Custom Field / Rich-Text Paragraph Field Values
≤3.1.1Update to 3.1.2
CVE-2026-90437
Critical9.8Unauthenticated PHP Object Injection via Post Custom Field
≤3.1.2Update to 3.1.3
CVE-2026-103039
High7.2Unauthenticated Stored Cross-Site Scripting via List Field
≤3.1.2Update to 3.1.3
CVE-2026-97645
High8.1Unauthenticated PHP Object Injection
<3.1.1Update to 3.1.1
CVE-2026-97296
Critical9.8Unauthenticated Arbitrary File Upload via Hidden File Upload Field
≤3.1.0.4Update to 3.1.1
CVE-2026-84434
Other PHP Object Injection vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via Image Alt Attribute in .wp-caption Containers
Lightbox & Modal Popup WordPress Plugin – FooBox≤2.8.7Update to 2.8.8
CVE-2026-120687
Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via 'Popup' Shortcode Attribute via Profile Video
FV Player 8≤8.1.9Update to 8.2.0
CVE-2026-110531
Medium5.4Unauthenticated Stored Cross-Site Scripting via 'title' Attribute of [bf_login_form] Shortcode
BuddyForms≤2.10.6Update to 2.10.7
CVE-2026-127115
High7.2Unauthenticated Stored Cross-Site Scripting via Multipart Field Name
Multi Step for Contact Form 7≤2.9.1Update to 2.9.2
CVE-2026-116753

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. 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.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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