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CVE-2026-55891

CVE-2026-55891 · PrivateBin: Reflected JSON injection in backend responses via unescaped REQUEST_URI

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

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 · Faible · EPSS 0,5% · Correctif disponible

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Mise à jour

Pile logicielle: php

Produits et versions concernés

  • privatebin

    Versions du logiciel
    • < 2.0.5: Concernée

    Aucun correctif publié

  • privatebin/privatebin Packagist

    Versions du logiciel
    • 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
    Plages de versions concernées
    • ECOSYSTEM: < 2.0.5

    Mettez à jour vers 2.0.5

Sources originales

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