Yoast SEO <= 20.2 — Authenticated (Contributor+) Stored Cross-Site Scripting
c0e58807-bccc-469f-82c3-a4bbf088a626Published · Updated Action summary
Affected: ≤20.2Update to 20.2.1 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Yoast SEO – Advanced SEO with real-time guidance and built-in AI wordpress-seo
- Affected≤ 20.2
- Patched in20.2.1
Update to 20.2.1 or newer.
You are affected if you run ≤ 20.2. Version 20.2.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Yoast SEO – Advanced SEO with real-time guidance and built-in AI.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 20.2.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Yoast SEO – Advanced SEO with real-time guidance and built-in AI to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Leonidas Milosis.
The Yoast SEO plugin for WordPress is vulnerable to DOM-based Cross-Site Scripting via individual post SEO details in versions up to, and including, 20.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with contributor-level requirements and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Yoast SEO – Advanced SEO with real-time guidance and built-in AI
All 20| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Author+) Stored Cross-Site Scripting via Post Slug (post_name) ≤28.0Update to 28.1 | CVE-2026-15425 | |
| Medium4.3 | Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Exposure via 'post_id' Parameter ≤26.5Update to 26.6 | CVE-2025-14481 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'jsonText' Block Attribute ≤27.1.1Update to 27.2 | CVE-2026-3427 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'yoast-schema' Block Attribute ≤26.8Update to 26.9 | CVE-2026-1293 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤22.6Update to 22.7 | CVE-2024-4984 |
- Medium6.4Authenticated (Author+) Stored Cross-Site Scripting via Post Slug (post_name)
≤28.0Update to 28.1
- Medium4.3Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Exposure via 'post_id' Parameter
≤26.5Update to 26.6
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'jsonText' Block Attribute
≤27.1.1Update to 27.2
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'yoast-schema' Block Attribute
≤26.8Update to 26.9
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤22.6Update to 22.7
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.4
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.