Post Snippets <= 4.0.19 - Authenticated (Administrator+) Stored Cross-Site Scripting via Import
The Post Snippets plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 4.0.19. This is due to insufficient output escaping of imported snippet content when rendering JavaScript variables in the post editor. Specifically, the jqueryUiDialog() method in WPEditor.php embeds snippet content directly into JavaScript string literals without escaping double quotes (the quote-escaping code on line 214 is commented out). When snippets are imported via the Import/Export feature, the content bypasses WordPress's wp_magic_quotes() (which would otherwise add protective backslashes), allowing double quotes in snippet content to break out of the JavaScript string context. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via a malicious import file that execute whenever any administrator accesses a post editor page. Please note that this does not affect single-site installations as administrators already have the unfiltered_html capability.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Plugin de WordPress | Post Snippets – Custom WordPress Code Snippets Customizer | <= 4.0.19 | 4.1.1 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N- Debilidad (CWE)
CWE-79- Plataforma
- WordPress
- Paquete
Post Snippets – Custom WordPress Code Snippets Customizer- Publicada
- 28.05.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
Wordfence Intelligence - 59dc2448-491c-478f-a784-c727057b126b - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Historial de vulnerabilidades: Post Snippets – Custom WordPress Code Snippets Customizer
Todas las vulnerabilidades publicadas de este paquete (Plugin de WordPress), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 9
- Primera → última
- 02.2019 06.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 3
- Media 5
Divulgaciones por año
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 2
- 2023: 2
- 2024: 0
- 2025: 1
- 2026: 3
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Post Snippets <= 4.0.19 - Authenticated (Administrator+) Stored Cross-Site Scripting via Import esta entrada
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