Mozilla: >> Firefox >> 120.0 Security Vulnerabilities
Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability affects Firefox < 142, Firefox ESR < 115.27, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
CVSS Score
8.1
EPSS Score
0.0
Published
2025-08-19
Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
CVSS Score
6.5
EPSS Score
0.001
Published
2025-08-19
Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
CVSS Score
7.5
EPSS Score
0.001
Published
2025-08-19
Spoofing issue in the Address Bar component. This vulnerability affects Firefox < 142 and Firefox ESR < 140.2.
CVSS Score
6.5
EPSS Score
0.0
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 affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
CVSS Score
8.1
EPSS Score
0.001
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 affects Firefox < 141.
CVSS Score
5.3
EPSS Score
0.0
Published
2025-08-19
Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability affects Firefox < 141.
CVSS Score
9.8
EPSS Score
0.001
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 affects Firefox < 141.
CVSS Score
4.3
EPSS Score
0.0
Published
2025-08-19
Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks This vulnerability affects Firefox for iOS < 142.
CVSS Score
7.5
EPSS Score
0.001
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 affects Firefox for iOS < 142.
CVSS Score
6.1
EPSS Score
0.0
Published
2025-08-19