CVE-2021-45085

Name: CVE-2021-45085
Creator: NVD / NIST
Published: 2021-12-16T03:15:10.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.49%

Last modified Jun 17, 2026

CVE-2021-45085 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 via an about: page, as demonstrated by ephy-about:overview when a user visits an XSS payload page often enough to place that page on the Most Visited list.. EPSS estimates a 1.49% chance of exploitation in the next 30 days.

Description

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 via an about: page, as demonstrated by ephy-about:overview when a user visits an XSS payload page often enough to place that page on the Most Visited list.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.49%

70.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Gnome	Epiphany	< 40.4
Gnome	Epiphany	>= 41.0, < 41.1
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://gitlab.gnome.org/GNOME/epiphany/-/issues/1612Exploit, Vendor Advisory
https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1045Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00006.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2022/dsa-5042Third Party Advisory
https://gitlab.gnome.org/GNOME/epiphany/-/issues/1612Exploit, Vendor Advisory
https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1045Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00006.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2022/dsa-5042Third Party Advisory

Timeline

Published: Dec 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45085?

How severe is CVE-2021-45085?

CVE-2021-45085 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.49% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45085?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45085?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST