The tags and multiselect fields allow to select tags from an autocompleted list. The tags field also allows to enter new tags or edit existing tags. Kirby already handled escaping of the autocompleted tags, but unfortunately the Panel used HTML rendering for new or edited tags as well as for custom tags from the content file.
This allowed attackers with Panel access to store malicious HTML code in a tag. The browser of the victim who visited the modified page in the Panel will then have rendered this malicious HTML code.
It also allowed self-inflicted XSS attacks in the tags field (meaning that malicious code is executed in the browser of the user who entered it). This could be used in social engineering attacks where a victim is convinced by an attacker to enter malicious code into a tags field.
Visitors without Panel access could only use this attack vector if your site allows changing the content of a tags or multiselect field from a frontend form (for example user self-registration or the creation of pages from a contact or other frontend form). If you validate or sanitize the provided form data, you are already protected against such attacks by external visitors.
You are also not affected by these vulnerabilities if your site doesn't have untrustworthy users with Panel access or a way to modify field values from the frontend or if you don't use the tags or multiselect fields.
Note: The fixes for these vulnerabilities have the side effect that values in the tags and multiselect fields that come from dynamic options are displayed with double escaping (e.g. the & character is displayed as &). We will fix the double escaping issues with a refactoring of the options fields (tags, multiselect, checkboxes, radio, select and toggles) in Kirby 3.8.
3.6.6
π Features
New A::random() and $collection->random() methods to get one or multiple random items from arrays and collections, optionally shuffled. Unless shuffled, the overall order of the returned items is kept. #4270
Added support for getting multiple properties from Toolkit\Obj objects and derived objects, like so: #4268
$thing = new Obj(['one' => 'π', 'two' => 'Kirby']);
When creating new instances of the Uri class, the params prop can now be set to false to treat colons/semicolons in the path as literals and not as param separators. This is useful for parsing external non-Kirby URIs. #2948
Support returning blueprint file path in callback for programmable blueprints #4281
π Fixes
Panel redirects to non-origin URLs caused a network exception. They now trigger a full redirect instead of sending the Fiber request. #4280
User blueprints can now use a callback (programmable blueprints) #4281
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Bumps getkirby/cms from 3.6.2 to 3.6.6.1.
Release notes
Sourced from getkirby/cms's releases.
... (truncated)
Commits
3a753ae
Update version number and cert bundle430abb7
Update dist filesd1d4ca4
Fix XSS issue in the MultiselectInpute81436c
Fix XSS issue in the TagsInput005fc78
Merge pull request #4300 from getkirby/release/3.6.60ff6757
Update dependencies0538c04
Merge pull request #4288 from getkirby/release/3.6.6-rc.1f97ec2a
Update dist files65bb081
Merge pull request #4281 from getkirby/fix/programmable-user-blueprints245d899
Merge pull request #4268 from adamkiss/feat-obj-get-multipleDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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