PT-2026-43531 · Gapgag55 · Auto Thumbnails

Publicado 2026-05-27 · Atualizado 2026-06-04 · CVE-2026-8899

Mitre

CVSS v3.1

6.4

Média

Vetor base

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

The Auto Thumbnail plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'thumbnails' shortcode in all versions up to, and including, 1.0. This is due to insufficient input sanitization and output escaping on the shortcode's 'width' and 'height' attributes in the athn thumbnails() function, which are concatenated directly into an HTML tag. 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.

Correção

XSS

Enumeração de Fraquezas

CWE-79

Identificadores relacionados

CVE-2026-8899

Produtos afetados

Auto Thumbnails

Referências · 5

• https://reddit.com/r/StopBadBots/comments/1twww49/insane_record_145_wordpress_plugins_exposed_with · Publicação no Reddit
• https://plugins.trac.wordpress.org/browser/automatic-thumbnail/tags/1.0/index.php#L34 · Nota
• https://plugins.trac.wordpress.org/browser/automatic-thumbnail/tags/1.0/index.php#L13 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-8899 · Nota de Segurança
• https://wordfence.com/threat-intel/vulnerabilities/id/f0cc349a-96f9-4b11-a0b4-28bc4ccc022c?source=cve · Nota