CVE-2026-4801: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in godaddy Page Builder Gutenberg Blocks – CoBlocks
The Page Builder Gutenberg Blocks – CoBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via external iCal feed data in all versions up to, and including, 3.1.16 due to insufficient output escaping of event titles, descriptions, and locations fetched from external iCal feeds in the Events block rendering function. 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-2026-4801 is a stored cross-site scripting vulnerability in the Page Builder Gutenberg Blocks – CoBlocks WordPress plugin (versions up to 3.1.16). The flaw is due to improper neutralization of input (CWE-79) when rendering event titles, descriptions, and locations obtained from external iCal feeds. Authenticated attackers with Contributor or higher privileges can inject arbitrary scripts into pages, which execute upon page access. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact.
Potential Impact
Successful exploitation allows authenticated users with Contributor-level access or above to inject malicious scripts into pages via external iCal feed data. These scripts execute in the context of users viewing the compromised pages, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability does not affect availability. There are no known exploits in the wild at this time.
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 the Events block or external iCal feed functionality if feasible. Monitor official GoDaddy or plugin vendor channels for updates and apply patches promptly once released.
CVE-2026-4801: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in godaddy Page Builder Gutenberg Blocks – CoBlocks
Description
The Page Builder Gutenberg Blocks – CoBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via external iCal feed data in all versions up to, and including, 3.1.16 due to insufficient output escaping of event titles, descriptions, and locations fetched from external iCal feeds in the Events block rendering function. 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.
CVSS v3.1
Score 6.4medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4801 is a stored cross-site scripting vulnerability in the Page Builder Gutenberg Blocks – CoBlocks WordPress plugin (versions up to 3.1.16). The flaw is due to improper neutralization of input (CWE-79) when rendering event titles, descriptions, and locations obtained from external iCal feeds. Authenticated attackers with Contributor or higher privileges can inject arbitrary scripts into pages, which execute upon page access. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact.
Potential Impact
Successful exploitation allows authenticated users with Contributor-level access or above to inject malicious scripts into pages via external iCal feed data. These scripts execute in the context of users viewing the compromised pages, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability does not affect availability. There are no known exploits in the wild at this time.
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 the Events block or external iCal feed functionality if feasible. Monitor official GoDaddy or plugin vendor channels for updates and apply patches promptly once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-25T10:02:15.632Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e30ab8bdfbbecc59e84c1c
Added to database: 4/18/2026, 4:38:16 AM
Last enriched: 4/26/2026, 2:43:19 AM
Last updated: 6/2/2026, 11:40:56 AM
Views: 87
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