Stored cross-site scripting in Schema App Structured Data plugin
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Schema App Structured Data for WordPress, in all versions up to and including 2.3.2, fails to sanitize input and escape output of comment content (CWE-79). An unauthenticated attacker can submit a comment containing script code that runs in the browser of a user who opens an affected page. Exploitation requires that an administrator has enabled the 'Remove Microdata' option and approves the malicious comment.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The Schema App Structured Data plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via 'Remove Microdata' Output Filter in all versions up to, and including, 2.3.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that an administrator has enabled the plugin's 'Remove Microdata' option and approves the malicious comment.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Schema App Structured Data.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-29 Threatist record created from CVE-2026-96666
- 2026-10-29 Alias added: GHSA-rv4v-2c82-p7gc
- 2026-10-29 CISA SSVC decision points changed
- 2026-10-29 Priority changed: MEDIUM → LOW
References
Other 4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7e0a6ba5-6b2a-49b2-8780-df5eb6a5eecd?source=cve
- https://plugins.trac.wordpress.org/browser/schema-app-structured-data-for-schemaorg/tags/2.3.2/lib/SchemaFront.php#L547
- https://plugins.trac.wordpress.org/browser/schema-app-structured-data-for-schemaorg/tags/2.3.2/lib/SchemaFront.php#L541
- https://plugins.trac.wordpress.org/browser/schema-app-structured-data-for-schemaorg/tags/2.3.2/lib/SchemaFront.php#L40
More vberkel vulnerabilities
- TI-2024-10449 Schema App Structured Data <= 2.2.4 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
- TI-2024-00822 Schema App Structured Data <= 2.2.0 - Cross-Site Request Forgery CVSS 3.1MEDIUM 4.3
Sources
- CVE-2026-96666 · CVE Program
- CVE-2026-96666 · NVD
- FIRST EPSS
- GHSA-rv4v-2c82-p7gc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences