Activity Stream can display content from sent from the Snippet Service website. This content is written to innerHTML on the Activity Stream page without sanitization, allowing for a potential access to other information available to the Activity Stream, such as browsing history, if the Snipper Service were compromised. This vulnerability affects Firefox < 68.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2019-21/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1408349 | issue tracking permissions required vendor advisory |
| https://security.gentoo.org/glsa/201908-12 | third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html | mailing list third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html | mailing list third party advisory vendor advisory |