CVE-2021-23984 (GCVE-0-2021-23984)

Vulnerability from cvelistv5 – Published: 2021-03-31 13:41 – Updated: 2024-08-03 19:14
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
  • Malicious extensions could have spoofed popup information
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox ESR Affected: unspecified , < 78.9 (custom)
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    Mozilla Firefox Affected: unspecified , < 87 (custom)
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    Mozilla Thunderbird Affected: unspecified , < 78.9 (custom)
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}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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