CVE-2021-45087
MEDIUMCVSS 6.1/10EPSS 1.49%
Last modified
CVE-2021-45087 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 when View Source mode or Reader mode is used, as demonstrated by a a page title.. 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 when View Source mode or Reader mode is used, as demonstrated by a a page title.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
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
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-45087?
XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 when View Source mode or Reader mode is used, as demonstrated by a a page title.
How severe is CVE-2021-45087?
CVE-2021-45087 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-2021-45087?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-45087?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST