Vulnerabilities (CVE)

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Filtered by vendor Mozilla Subscribe
Filtered by product Firefox Esr
Total 958 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-29980 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2022-12-09 6.8 MEDIUM 8.8 HIGH
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
CVE-2021-29976 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2022-12-09 6.8 MEDIUM 8.8 HIGH
Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
CVE-2021-29970 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2022-12-09 5.1 MEDIUM 8.8 HIGH
A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
CVE-2021-29967 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2022-12-09 6.8 MEDIUM 8.8 HIGH
Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. 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 Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
CVE-2021-43541 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.5 MEDIUM
When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43538 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 4.3 MEDIUM
By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43539 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 6.8 MEDIUM 8.8 HIGH
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-38507 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.5 MEDIUM
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-43536 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.5 MEDIUM
Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43542 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.5 MEDIUM
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-38508 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 4.3 MEDIUM
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-38506 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 4.3 MEDIUM
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-38504 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 6.8 MEDIUM 8.8 HIGH
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-38509 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 4.3 MEDIUM
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-38503 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 7.5 HIGH 10.0 CRITICAL
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-43537 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 6.8 MEDIUM 8.8 HIGH
An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43545 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.5 MEDIUM
Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43543 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2022-12-09 4.3 MEDIUM 6.1 MEDIUM
Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2020-15652 2 Canonical, Mozilla 4 Ubuntu Linux, Firefox, Firefox Esr and 1 more 2022-12-06 4.3 MEDIUM 6.5 MEDIUM
By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
CVE-2020-15678 3 Debian, Mozilla, Opensuse 5 Debian Linux, Firefox, Firefox Esr and 2 more 2022-11-16 6.8 MEDIUM 8.8 HIGH
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.