What’s Vulnerable › Vulnerabilities

CVE-2021-45086

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-16 · updated 2026-06-17
• Weakness: CWE-79

Description

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 because a server's suggested_filename is used as the pdf_name value in PDF.js.

Affected products

• Debian Linux: 11.0
• GNOME Epiphany: before 40.4; from 41.0 before 41.1 — fixed in 40.4, 41.1

How to fix

Upgrade to a fixed version: GNOME Epiphany 40.4, 41.1. Check the vendor advisory for mitigations.

References

• https://gitlab.gnome.org/GNOME/epiphany/-/issues/1612
• https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1045
• https://www.debian.org/security/2022/dsa-5042
• https://gitlab.gnome.org/GNOME/epiphany/-/issues/1612
• https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1045
• https://www.debian.org/security/2022/dsa-5042

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