CVE-2026-1889
Stored XSS in Outgrow WordPress Plugin Allows Script Injection
Publication date: 2026-03-21
Last updated on: 2026-03-21
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| outgrow | outgrow | to 2.1 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The Outgrow plugin for WordPress has a vulnerability known as Stored Cross-Site Scripting (XSS) in its 'id' attribute of the 'outgrow' shortcode. This vulnerability exists in all versions up to and including 2.1. It occurs because the plugin does not properly sanitize or escape user-supplied input in this attribute.
As a result, an authenticated attacker with contributor-level access or higher can inject malicious web scripts into pages. These scripts will execute whenever any user accesses the affected page.
How can this vulnerability impact me? :
This vulnerability allows attackers with contributor-level access or above to inject arbitrary scripts into web pages. These scripts can execute in the context of users visiting those pages, potentially leading to theft of user data, session hijacking, or other malicious actions.
Because the vulnerability is a Stored Cross-Site Scripting issue, the malicious code is permanently stored on the affected site and can impact any user who views the infected page.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know