CVE-2026-8884: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in neilmccutcheon Instant-Quote.co Quotation Page
The Instant-Quote.co Quotation Page plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.3.4 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. A Contributor-level user can trigger execution against higher-privileged users by embedding the malicious shortcode in a post submitted for review, causing the injected scripts to execute when an administrator previews or views the post.
AI Analysis
Technical Summary
CVE-2026-8884 is a stored cross-site scripting vulnerability in the Instant-Quote.co Quotation Page WordPress plugin (versions up to 1.3.4). The flaw allows authenticated contributors or higher to inject arbitrary scripts through shortcode attributes. These scripts execute in the context of users who view or preview the injected posts, potentially including administrators. The vulnerability is due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of shortcode attributes.
Potential Impact
Successful exploitation allows an authenticated contributor-level user to execute arbitrary JavaScript in the browsers of higher-privileged users, such as administrators, when they view or preview posts containing the malicious shortcode. This can lead to information disclosure or session hijacking limited to the privileges of the affected users. There is no indication of denial of service or direct system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict contributor-level access carefully and avoid previewing or publishing posts containing untrusted shortcode content. Monitor official channels for updates or patches from the plugin vendor.
CVE-2026-8884: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in neilmccutcheon Instant-Quote.co Quotation Page
Description
The Instant-Quote.co Quotation Page plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.3.4 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. A Contributor-level user can trigger execution against higher-privileged users by embedding the malicious shortcode in a post submitted for review, causing the injected scripts to execute when an administrator previews or views the post.
CVSS v3.1
Score 6.4medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8884 is a stored cross-site scripting vulnerability in the Instant-Quote.co Quotation Page WordPress plugin (versions up to 1.3.4). The flaw allows authenticated contributors or higher to inject arbitrary scripts through shortcode attributes. These scripts execute in the context of users who view or preview the injected posts, potentially including administrators. The vulnerability is due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of shortcode attributes.
Potential Impact
Successful exploitation allows an authenticated contributor-level user to execute arbitrary JavaScript in the browsers of higher-privileged users, such as administrators, when they view or preview posts containing the malicious shortcode. This can lead to information disclosure or session hijacking limited to the privileges of the affected users. There is no indication of denial of service or direct system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict contributor-level access carefully and avoid previewing or publishing posts containing untrusted shortcode content. Monitor official channels for updates or patches from the plugin vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-05-18T20:34:29.934Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a169063e29bf47b509e17a3
Added to database: 5/27/2026, 6:34:11 AM
Last enriched: 5/27/2026, 6:49:48 AM
Last updated: 5/29/2026, 4:27:22 AM
Views: 7
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