CVE-2021-29953

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

A malicious webpage could have forced a Firefox for Android user into executing attacker-controlled JavaScript in the context of another domain, resulting in a Universal Cross-Site Scripting vulnerability. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected. Further details are being temporarily withheld to allow users an opportunity to update.*. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Jun 24, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-299549.8Proxy functionality built into Hubs Cloud’s Reticulum software allowed access to internal URLs, including the metadata service. This vulneraCVE-2021-299555.3A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and CVE-2021-299564.3OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored unencrypted on the user's local diCVE-2021-299574.3If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, ThundCVE-2021-299584.3When a download was initiated, the client did not check whether it was in normal or private browsing mode, which led to private mode cookiesCVE-2021-299594.3When a user has already allowed a website to access microphone and camera, disabling camera sharing would not fully prevent the website fromCVE-2021-299604.3Firefox used to cache the last filename used for printing a file. When generating a filename for printing, Firefox usually suggests the web CVE-2021-299614.3When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over tCVE-2021-299624.3Firefox for Android would become unstable and hard-to-recover when a website opened too many popups. *This bug only affects Firefox for AndrCVE-2021-299634.3Address bar search suggestions in private browsing mode were re-using session data from normal mode. *This bug only affects Firefox for AndrCVE-2021-299647.1A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds reCVE-2021-299655.3A malicious website that causes an HTTP Authentication dialog to be spawned could trick the built-in password manager to suggest passwords f
CVE-2021-29953: Medium severity, CVSS 6.1 | Vulnix