Mozilla: Security Vulnerabilities
Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 142 and Firefox ESR 140.2.
CVSS Score
6.5
EPSS Score
0.002
Published
2025-08-19
Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2.
CVSS Score
8.1
EPSS Score
0.003
Published
2025-08-19
In the address bar, Firefox for Android truncated the display of URLs from the end instead of prioritizing the origin. This vulnerability was fixed in Firefox 141.
CVSS Score
5.3
EPSS Score
0.003
Published
2025-08-19
Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability was fixed in Firefox 141.
CVSS Score
9.8
EPSS Score
0.004
Published
2025-08-19
A crafted URL using a blob: URI could have hidden the true origin of the page, resulting in a potential spoofing attack.
*Note: This issue only affected Android operating systems. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 141.
CVSS Score
4.3
EPSS Score
0.002
Published
2025-08-19
Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks. This vulnerability was fixed in Firefox for iOS 142.
CVSS Score
7.5
EPSS Score
0.003
Published
2025-08-19
Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.
CVSS Score
6.1
EPSS Score
0.001
Published
2025-08-19
Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability was fixed in Firefox for iOS 142 and Focus for iOS 142.
CVSS Score
9.8
EPSS Score
0.004
Published
2025-08-19
Focus for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline, potentially allowing for XSS attacks. This vulnerability was fixed in Focus for iOS 142.
CVSS Score
6.1
EPSS Score
0.001
Published
2025-08-19
Dragging JavaScript links to the URL bar in Focus for iOS could be utilized to run malicious scripts, potentially resulting in XSS attacks. This vulnerability was fixed in Focus for iOS 142.
CVSS Score
6.1
EPSS Score
0.002
Published
2025-08-19