| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 97.0 | 97.0 |
| firefox esr | < 91.6 | 91.6 |
| thunderbird | < 91.6 | 91.6 |
If a document created a sandboxed iframe without <code>allow-scripts</code>, and subsequently appended an element to the iframe's document that e.g. had a JavaScript event handler - the event handler would have run despite the iframe's sandbox. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.
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