CVE-2021-23984
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-23984
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23984.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 78.9.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 87.0-1 |
| debian | bookworm | fixed | 78.9.0esr-1 |
| debian | bullseye | fixed | 78.9.0esr-1 |
| debian | forky | fixed | 78.9.0esr-1 |
| debian | trixie | fixed | 78.9.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.