CVE-2025-1703: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ultimateblocks Ultimate Blocks – 25+ Gutenberg Blocks for Block Editor
The Ultimate Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘content’ parameter in all versions up to, and including, 3.2.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI Analysis
Technical Summary
CVE-2025-1703 is a stored cross-site scripting vulnerability in the Ultimate Blocks WordPress plugin (up to version 3.2.7). The issue stems from improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of the 'content' parameter. This allows authenticated users with Contributor-level permissions or higher to inject arbitrary web scripts that execute when the injected page is accessed, potentially impacting confidentiality and integrity of user sessions.
Potential Impact
An attacker with Contributor-level access or above can inject persistent malicious scripts into pages, which execute in the context of users viewing those pages. This can lead to unauthorized actions or data disclosure limited to the scope of the affected site. The vulnerability does not affect availability and requires authentication, reducing the overall risk but still posing a significant threat to site integrity and user trust.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the affected plugin. Monitor official Ultimate Blocks and WordPress security channels for updates and apply patches promptly once released.
CVE-2025-1703: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ultimateblocks Ultimate Blocks – 25+ Gutenberg Blocks for Block Editor
Description
The Ultimate Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘content’ parameter in all versions up to, and including, 3.2.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-1703 is a stored cross-site scripting vulnerability in the Ultimate Blocks WordPress plugin (up to version 3.2.7). The issue stems from improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of the 'content' parameter. This allows authenticated users with Contributor-level permissions or higher to inject arbitrary web scripts that execute when the injected page is accessed, potentially impacting confidentiality and integrity of user sessions.
Potential Impact
An attacker with Contributor-level access or above can inject persistent malicious scripts into pages, which execute in the context of users viewing those pages. This can lead to unauthorized actions or data disclosure limited to the scope of the affected site. The vulnerability does not affect availability and requires authentication, reducing the overall risk but still posing a significant threat to site integrity and user trust.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the affected plugin. Monitor official Ultimate Blocks and WordPress security channels for updates and apply patches promptly once released.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-02-25T22:43:19.787Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699f6b17b7ef31ef0b54e0ac
Added to database: 2/25/2026, 9:35:19 PM
Last enriched: 4/9/2026, 10:04:54 AM
Last updated: 4/12/2026, 2:53:04 PM
Views: 27
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