Skip to content

Known vulnerabilities in Mozilla Firefox ESR

Is your version affected?

CVE Summary Score Published
CVE-2021-43534 Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2 Not rated Dec 8, 2021
CVE-2021-43535 A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory… Not rated Dec 8, 2021
CVE-2021-43536 Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL Not rated Dec 8, 2021
CVE-2021-43537 An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a… Not rated Dec 8, 2021
CVE-2021-43538 By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that… Not rated Dec 8, 2021
CVE-2021-43539 Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within… Not rated Dec 8, 2021
CVE-2021-43541 When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly… Not rated Dec 8, 2021
CVE-2021-43542 Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading… Not rated Dec 8, 2021
CVE-2021-43543 Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding… Not rated Dec 8, 2021
CVE-2021-43545 Using the Location API in a loop could have caused severe application hangs and crashes Not rated Dec 8, 2021
CVE-2021-43546 It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor Not rated Dec 8, 2021
CVE-2021-38492 When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to… Not rated Nov 3, 2021
CVE-2021-38493 Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13 Not rated Nov 3, 2021
CVE-2021-38495 Mozilla developers reported memory safety bugs present in Thunderbird 78.13.0 Not rated Nov 3, 2021
CVE-2021-38496 During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory… Not rated Nov 3, 2021
CVE-2021-38497 Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another… Not rated Nov 3, 2021
CVE-2021-38498 During process shutdown, a document could have caused a use-after-free of a languages service object, leading to… Not rated Nov 3, 2021
CVE-2021-38500 Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1 Not rated Nov 3, 2021
CVE-2021-38501 Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1 Not rated Nov 3, 2021
CVE-2021-29980 Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a… Not rated Aug 17, 2021
CVE-2021-29984 Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered… Not rated Aug 17, 2021
CVE-2021-29985 A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash Not rated Aug 17, 2021
CVE-2021-29986 A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash Not rated Aug 17, 2021
CVE-2021-29988 Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory… Not rated Aug 17, 2021
CVE-2021-29989 Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12 Not rated Aug 17, 2021

Other Mozilla products