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SEOPress <= 6.5.0.2 — Authenticated (Administrator+) PHP Object Injection

CVE-2023-1669Published · Updated

Action summary

Affected: ≤6.5.0.2Update to 6.5.0.3 or newer

All remediation steps
Watch plugin
Severity
Medium6.6
CVSS
6.6
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:H Attack complexity
High
PR:H Privileges required
High
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
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?

SEOPress – AI SEO Plugin & On-site SEO wp-seopress

  1. Affected≤ 6.5.0.2
  2. Patched in6.5.0.3

Update to 6.5.0.3 or newer.

You are affected if you run ≤ 6.5.0.2. Version 6.5.0.3 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under SEOPress – AI SEO Plugin & On-site SEO.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 6.5.0.3, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch SEOPress – AI SEO Plugin & On-site SEO to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Nguyen Huu Do.

The SEOPress plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 6.5.0.2 via deserialization of untrusted input of the $redirect_value['sources'] value triggered to an import with the seopress_import_rk_redirections function. This allows authenticated attackers, with administrator-level privileges, 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.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in SEOPress – AI SEO Plugin & On-site SEO

All 20
More vulnerabilities in SEOPress – AI SEO Plugin & On-site SEO
SeverityVulnerabilityCVEPublished
Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via 'seopress_google_analytics_affiliate_tracking' and 'seopress_google_analytics_download_tracking' Parameters
≤10.3Update to 10.4
CVE-2026-120515
Medium6.4Authenticated (Custom Role+) Stored Cross-Site Scripting
<10.4Update to 10.4
CVE-2026-108041
Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via 'display_name' Profile Field via %%archive_title%% Template Tag
≤10.3Update to 10.4
CVE-2026-116535
Medium4.9Authenticated (Subscriber+) Stored Cross-Site Scripting via 'seopress_google_analytics_matomo_id' Parameter
≤10.2Update to 10.3
CVE-2026-101357
High7.2Unauthenticated Stored Cross-Site Scripting via Author Display Name
≤10.2Update to 10.3
CVE-2026-96564

Same weakness (PHP Object Injection)

All PHP Object Injection
Other PHP Object Injection vulnerabilities
SeverityVulnerabilityCVEPublished
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
CVE-2026-120688
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
CVE-2026-125055
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
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 6.6

  2. 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.

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