CVE-2024-9393: An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://pdf.js` origin. This could allow...

Description

An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://pdf.js` origin. This could allow them to access cross-origin PDF content. This access is limited to "same site" documents by the Site Isolation feature on desktop clients, but full cross-origin access is possible on Android versions. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

Classification

CVE ID: CVE-2024-9393

Problem Types

Cross-origin access to PDF contents through multipart responses

Affected Products

Vendor: Mozilla, Mozilla, Mozilla, Mozilla, Mozilla

Product: Firefox, Firefox ESR, Firefox ESR, Thunderbird, Thunderbird

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.06% (probability of being exploited)

EPSS Percentile: 16.42% (scored less or equal to compared to others)

EPSS Date: 2025-04-12 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: partial

SSVC Automatable: true

References

https://nvd.nist.gov/vuln/detail/CVE-2024-9393
https://bugzilla.mozilla.org/show_bug.cgi?id=1918301
https://www.mozilla.org/security/advisories/mfsa2024-46/
https://www.mozilla.org/security/advisories/mfsa2024-47/
https://www.mozilla.org/security/advisories/mfsa2024-48/
https://www.mozilla.org/security/advisories/mfsa2024-49/
https://www.mozilla.org/security/advisories/mfsa2024-50/

Timeline