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CVSS: 10.0EPSS: 1%CPEs: 5EXPL: 0

24 May 2022 — An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1. Un atacante podría haber enviado un mensaje al proceso principal donde el contenido se usó para realizar un doble índice en un objeto J... • https://bugzilla.mozilla.org/show_bug.cgi?id=1770048 • CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') •

CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0

05 May 2022 — The parent process would not properly check whether the Speech Synthesis feature is enabled, when receiving instructions from a child process. This vulnerability affects Thunderbird < 91.9. El proceso principal no verificaba adecuadamente si la función Speech Synthesis está habilitada al recibir instrucciones de un proceso secundario. Esta vulnerabilidad afecta a Thunderbird &lt; 91.9. A flaw was found in Mozilla. • https://bugzilla.mozilla.org/show_bug.cgi?id=1764778 • CWE-1173: Improper Use of Validation Framework •

CVSS: 5.0EPSS: 0%CPEs: 1EXPL: 0

05 May 2022 — When viewing an email message A, which contains an attached message B, where B is encrypted or digitally signed or both, Thunderbird may show an incorrect encryption or signature status. After opening and viewing the attached message B, when returning to the display of message A, the message A might be shown with the security status of message B. This vulnerability affects Thunderbird < 91.9. Al visualizar un mensaje de correo electrónico A, que contiene un mensaje B adjunto, donde B está cifrado o firmado ... • https://bugzilla.mozilla.org/show_bug.cgi?id=1745019 • CWE-203: Observable Discrepancy •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0

04 May 2022 — Documents in deeply-nested cross-origin browsing contexts could have obtained permissions granted to the top-level origin, bypassing the existing prompt and wrongfully inheriting the top-level permissions. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. Los documentos en contextos de navegación entre orígenes profundamente anidados podrían haber obtenido permisos otorgados al origen de nivel superior, omitiendo el mensaje existente y heredando erróneamente los permisos ... • https://bugzilla.mozilla.org/show_bug.cgi?id=1755081 • CWE-276: Incorrect Default Permissions CWE-281: Improper Preservation of Permissions •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0

04 May 2022 — When reusing existing popups Firefox would have allowed them to cover the fullscreen notification UI, which could have enabled browser spoofing attacks. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. Al reutilizar ventanas emergentes existentes, Firefox les habría permitido cubrir la interfaz de usuario de notificación en pantalla completa, lo que podría haber permitido ataques de suplantación de identidad del navegador. Esta vulnerabilidad afecta a Thunderbird < 91... • https://bugzilla.mozilla.org/show_bug.cgi?id=1746448 • CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0

04 May 2022 — An improper implementation of the new iframe sandbox keyword allow-top-navigation-by-user-activation could lead to script execution without allow-scripts being present. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. Una implementación incorrecta de la nueva palabra clave de iframe sandbox allow-top-navigation-by-user-activation podría provocar la ejecución del script sin que allow-scripts esté presente. Esta vulnerabi... • https://bugzilla.mozilla.org/show_bug.cgi?id=1761981 • CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 4

04 May 2022 — Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the browser history. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. Firefox se comportó de manera ligeramente diferente para recursos ya conocidos al cargar recursos CSS que involucraban variables CSS. Esto podría haberse utilizado para sondear el historial del navegador. • https://bugzilla.mozilla.org/show_bug.cgi?id=1760674 • CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 1

04 May 2022 — Mozilla developers Andrew McCreight, Gabriele Svelto, Tom Ritter and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 99 and Firefox ESR 91.8. 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 < 91.9, Firefox ESR < 91.9, and Firefox < 100. Los desarrolladores de Mozilla, Andrew McCreight, Gabriele Svelto, Tom Ritter y el equipo Mozilla Fuzz... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1684739%2C1706441%2C1753298%2C1762614%2C1762620%2C1764778 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 6.4EPSS: 0%CPEs: 3EXPL: 1

04 May 2022 — Requests initiated through reader mode did not properly omit cookies with a SameSite attribute. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. Las solicitudes iniciadas a través del modo lector no omitieron correctamente las cookies con un atributo SameSite. Esta vulnerabilidad afecta a Thunderbird &lt; 91.9, Firefox ESR &lt; 91.9 y Firefox &lt; 100. A flaw was found in Mozilla. • https://bugzilla.mozilla.org/show_bug.cgi?id=1692655 • CWE-565: Reliance on Cookies without Validation and Integrity Checking CWE-601: URL Redirection to Untrusted Site ('Open Redirect') •

CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0

11 Apr 2022 — When importing a revoked key that specified key compromise as the revocation reason, Thunderbird did not update the existing copy of the key that was not yet revoked, and the existing key was kept as non-revoked. Revocation statements that used another revocation reason, or that didn't specify a revocation reason, were unaffected. This vulnerability affects Thunderbird < 91.8. Al importar una clave revocada que especificaba el compromiso de la clave como motivo de revocación, Thunderbird no actualizaba la c... • https://bugzilla.mozilla.org/show_bug.cgi?id=1754985 • CWE-295: Improper Certificate Validation •