Relevanssi – A Better Search <= 4.28.4 — Authenticated (Editor+) PHP Object Injection
CVE-2026-114704Published · Updated Action summary
Affected: ≤4.28.4Update to 4.28.5 or newer
All remediation steps- Severity
- Medium6.6
- CVSS
- 6.6CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:HAttack complexity- High
PR:HPrivileges required- High
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-502 PHP Object Injection
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Relevanssi – A Better Search relevanssi
- Affected≤ 4.28.4
- Patched in4.28.5
Update to 4.28.5 or newer.
You are affected if you run ≤ 4.28.4. Version 4.28.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Relevanssi – A Better Search.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.28.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Relevanssi – A Better Search to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Ananda Dhakal.
The Relevanssi – A Better Search plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.28.4. This is due to deserialization of untrusted input. This makes it possible for authenticated attackers, with editor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. 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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Relevanssi – A Better Search
All 22| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment Content via Late Entity Decode ≤4.28.5Update to 4.28.6 | CVE-2026-116522 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment Content ≤4.28.3Update to 4.28.4 | CVE-2026-97641 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤4.28.1Update to 4.28.2 | CVE-2026-19985 | |
| Medium6.5 | Authenticated (Contributor+) SQL Injection ≤2.30.2Update to 2.30.3 | CVE-2026-15941 | |
| Medium6.5 | Authenticated (Contributor+) SQL Injection <2.29.0Update to 2.29.0 | CVE-2025-14719 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment Content via Late Entity Decode
≤4.28.5Update to 4.28.6
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment Content
≤4.28.3Update to 4.28.4
- Medium6.1Reflected Cross-Site Scripting
≤4.28.1Update to 4.28.2
- Medium6.5Authenticated (Contributor+) SQL Injection
≤2.30.2Update to 2.30.3
- Medium6.5Authenticated (Contributor+) SQL Injection
<2.29.0Update to 2.29.0
Same weakness (PHP Object Injection)
All PHP Object Injection| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.6
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. 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.