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WordPress plugin

WP BrowserUpdate <= 4.5 — Authenticated (Admin+) Stored Cross-Site Scripting

CVE-2023-28690Published · Updated

Action summary

Affected: ≤4.5Update to 4.6 or newer

All remediation steps
Watch plugin
Severity
Medium4.8
CVSS
4.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:H Privileges required
High
UI:R User interaction
Required
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

WP BrowserUpdate wp-browser-update

  1. Affected≤ 4.5
  2. Patched in4.6

Update to 4.6 or newer.

You are affected if you run ≤ 4.5. Version 4.6 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP BrowserUpdate.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 4.6, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch WP BrowserUpdate to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to qilin_99.

The WP BrowserUpdate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the multiple parameters in versions up to, and including, 4.5 due to insufficient input sanitization and output escaping. Combined with a Cross-Site Request Forgery vulnerability in versions <= 4.4.1, this makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute if they can successfully trick a user into performing an action such as clicking on a link. In version 4.5, this issue is only exploited by authenticated administrative users.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in WP BrowserUpdate

All 2
More vulnerabilities in WP BrowserUpdate
SeverityVulnerabilityCVEPublished
Medium4.3Cross-Site Request Forgery via wpbu_administration
≤4.4.1Update to 4.5
CVE-2023-31078

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting 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 4.8

  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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