CVE-2026-15425 json
Yoast SEO <= 28.0 - Authenticated (Author+) Stored Cross-Site Scripting via Post Slug (post_name)
published 2026-07-25 3 mo ago modified 2026-07-27 3 mo ago also EUVD-2026-48765
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
The Yoast SEO – Advanced SEO with real-time guidance and built-in AI plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Slug (post_name) in all versions up to, and including, 28.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires pretty permalinks to be enabled, as the exploit chain depends on get_permalink() embedding the stored percent-encoded post_name in the generated URL.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- yoast Yoast SEO – Advanced SEO with real-time guidance and built-in AI
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4b2fa1b7-a5af-4ea6-9bee-19a6cdfd7701?source=cve
- plugins.trac.wordpress.org /browser/wordpress-seo/tags/28.0/admin/class-bulk-editor-list-table.php#L900
- plugins.trac.wordpress.org /browser/wordpress-seo/tags/28.0/admin/class-bulk-editor-list-table.php#L898
- plugins.trac.wordpress.org /browser/wordpress-seo/tags/27.6/admin/class-bulk-editor-list-table.php#L900
- plugins.trac.wordpress.org /browser/wordpress-seo/tags/27.6/admin/class-bulk-editor-list-table.php#L898
- plugins.trac.wordpress.org /changeset/3598937/wordpress-seo/trunk/admin/class-bulk-editor-list-table.php
- plugins.trac.wordpress.org /changeset?old_path=%2Fwordpress-seo/tags/28.0&new_path=%2Fwordpress-seo/tags/28.1
Sources
- CVE List CVE-2026-15425
- NVD CVE-2026-15425
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.