CVEvulnerability
CVE-2020-15654
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-08-10
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-835
Description
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Affected configurations
• mozilla firefox (< 79.0)
• mozilla firefox esr (< 78.1)
• mozilla thunderbird (< 78.1)
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
• canonical ubuntu linux 20.04
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1648333 Issue Tracking, Vendor Advisory
- https://usn.ubuntu.com/4443-1/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-30/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-32/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-33/ Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1648333 Issue Tracking, Vendor Advisory
- https://usn.ubuntu.com/4443-1/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-30/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-32/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-33/ Vendor Advisory