CVE-2026-55891
CVE-2026-55891 · PrivateBin: Reflected JSON injection in backend responses via unescaped REQUEST_URI
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Prior to 2.0.5, Request::getRequestUri() in lib/Request.php passes $_SERVER['REQUEST_URI'] through FILTER_SANITIZE_URL, which does not remove quotation marks, angle brackets, or apostrophes, and Controller::_init() stores the attacker-controlled value in Controller::$_urlBase. Controller::_jsonld() in lib/Controller.php then uses str_replace() to insert that value without JSON escaping into js/types.jsonld, js/paste.jsonld, and the other JSON-LD templates used by /?jsonld= and /?pasteid. A raw quotation mark delivered by an HTTP client, proxy, or structured-data crawler that does not normalize the request target can break out of the JSON string and inject arbitrary key-value data into a CORS-open application/ld+json response. The jsonld branch in Controller::__construct() returns before _setCacheHeaders(), so the response also lacks X-Content-Type-Options: nosniff, Content Security Policy, X-Frame-Options, and Referrer-Policy. Direct script execution was not demonstrated, but manipulated responses can affect structured-data consumers or combine with less strict clients. This issue is fixed in version 2.0.5.
CVSS 0.0 · Baja · EPSS 0,5% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: php
Productos y versiones afectados
privatebin
- Versiones
- < 2.0.5: Afectada
Sin corrección publicada
privatebin/privatebin Packagist
- Versiones
- 1.0
- 1.1
- 1.1.1
- 1.2
- 1.2.1
- 1.2.2
- 1.2.3
- 1.3
- 1.3.1
- 1.3.2
- 1.3.3
- 1.3.4
- 1.3.5
- 1.4.0
- 1.5.0
- 1.5.1
- 1.5.2
- 1.6.0
- 1.6.1
- 1.6.2
- 1.7.0
- 1.7.1
- 1.7.2
- 1.7.3
- 1.7.4
- 1.7.5
- 1.7.6
- 1.7.7
- 1.7.8
- 1.7.9
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.0.5
Actualiza a 2.0.5