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CVE-2022-41938: XSS vulnerability with discussion titles

Flarum is an open source discussion platform. Flarum’s page title system allowed for page titles to be converted into HTML DOM nodes when pages were rendered. The change was made after v1.5 and was not noticed. This allowed an attacker to inject malicious HTML markup using a discussion title input, either by creating a new discussion or renaming one. The XSS attack occurs after a visitor opens the relevant discussion page. All communities running Flarum from v1.5.0 to v1.6.1 are impacted. The vulnerability has been fixed and published as flarum/core v1.6.2. All communities running Flarum from v1.5.0 to v1.6.1 have to upgrade as soon as possible to v1.6.2. There are no known workarounds for this issue.

CVE
#xss#vulnerability

Package

Affected versions

>=1.5.0, <1.6.2

Flarum’s page title system allowed for page titles to be converted into HTML DOM nodes when pages were rendered. The change was made after v1.5 and was not noticed.

This allowed an attacker to inject malicious HTML markup using a discussion title input, either by creating a new discussion or renaming one. The XSS attack occurs after a visitor opens the relevant discussion page.

Impact

All communities running Flarum from v1.5.0 to v1.6.1 are impacted.

Patches

The vulnerability has been fixed and published as flarum/core v1.6.2. All communities running Flarum from v1.5.0 to v1.6.1 have to upgrade as soon as possible to v1.6.2 using:

composer update --prefer-dist --no-dev -a -W

You can then confirm you run the latest version using:

composer show flarum/core

Workarounds

None.

For more information

For any questions or comments on this vulnerability please visit https://discuss.flarum.org/d/27558.

For support questions create a discussion at https://discuss.flarum.org/t/support.

A reminder that if you ever become aware of a security issue in Flarum, please report it to us privately by emailing [email protected], and we will address it promptly.

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GHSA-7x4w-j98p-854x: Cross site scripting vulnerability with discussion titles

Flarum's page title system allowed for page titles to be converted into HTML DOM nodes when pages were rendered. The change was made after `v1.5` and was not noticed. This allowed an attacker to inject malicious HTML markup using a discussion title input, either by creating a new discussion or renaming one. The XSS attack occurs after a visitor opens the relevant discussion page. ### Impact All communities running Flarum from `v1.5.0` to `v1.6.1` are impacted. ### Patches The vulnerability has been fixed and published as flarum/core `v1.6.2`. All communities running Flarum from `v1.5.0` to `v1.6.1` have to upgrade as soon as possible to v1.6.2 using: ``` composer update --prefer-dist --no-dev -a -W ``` You can then confirm you run the latest version using: ``` composer show flarum/core ``` ### Workarounds **None.** ### For more information For any questions or comments on this vulnerability please visit https://discuss.flarum.org/d/27558. For support questions create a discuss...

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