@storybook/addon-actions is a vital tool for Storybook developers, enabling them to log actions performed within their components for easy tracking and debugging. Comparing versions 6.0.6 and 6.0.5 reveals subtle but important changes. While both versions share the same core dependencies, development dependencies, peer dependencies (react-dom), licensing (MIT), repository information, file count, unpacked size and action logger description, the key difference lies in the versions of internal Storybook packages they depend on: @storybook/api, @storybook/addons, @storybook/theming, @storybook/client-api, @storybook/components, and @storybook/core-events are bumped from 6.0.5 to 6.0.6 in the newer version. This suggests that version 6.0.6 incorporates updates and fixes from the core Storybook framework, potentially including bug fixes, performance improvements, or new features in the Storybook UI or API. Developers should upgrade to 6.0.6 to ensure compatibility with the latest Storybook features and benefit from any improvements to the action logging functionality or the broader Storybook environment. The updated release date (August 13, 2020, for 6.0.6 vs. August 12, 2020, for 6.0.5) confirms the newer version incorporates recent additions. Developers leveraging Storybook's action logging capabilities should always aim to use the latest stable version to maximize stability and access the newest enhancements.
All the vulnerabilities related to the version 6.0.6 of the package
Cross site scripting in markdown-to-jsx
Versions of the package markdown-to-jsx before 7.4.0 are vulnerable to Cross-site Scripting (XSS) via the src property due to improper input sanitization. An attacker can execute arbitrary code by injecting a malicious iframe element in the markdown.
Prototype Pollution in highlight.js
Affected versions of this package are vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable.
The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector.
If your website or application does not render user provided data it should be unaffected.
Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release.
Manually patch your library to create null objects for both languages and aliases:
const HLJS = function(hljs) {
// ...
var languages = Object.create(null);
var aliases = Object.create(null);
Filter the language names that users are allowed to inject into your HTML to guarantee they are valid.
If you have any questions or comments about this advisory:
ReDOS vulnerabities: multiple grammars
The Regular expression Denial of Service (ReDoS) is a Denial of Service attack, that exploits the fact that most Regular Expression implementations may reach extreme situations that cause them to work very slowly (exponentially related to input size). An attacker can then cause a program using a Regular Expression to enter these extreme situations and then hang for a very long time.
If are you are using Highlight.js to highlight user-provided data you are possibly vulnerable. On the client-side (in a browser or Electron environment) risks could include lengthy freezes or crashes... On the server-side infinite freezes could occur... effectively preventing users from accessing your app or service (ie, Denial of Service).
This is an issue with grammars shipped with the parser (and potentially 3rd party grammars also), not the parser itself. If you are using Highlight.js with any of the following grammars you are vulnerable. If you are using highlightAuto to detect the language (and have any of these grammars registered) you are vulnerable. Exponential grammars (C, Perl, JavaScript) are auto-registered when using the common grammar subset/library require('highlight.js/lib/common') as of 10.4.0 - see https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.4.0/build/highlight.js
All versions prior to 10.4.1 are vulnerable, including version 9.18.5.
Grammars with exponential backtracking issues:
And of course any aliases of those languages have the same issue. ie: hpp is no safer than cpp.
Grammars with polynomial backtracking issues:
And again: any aliases of those languages have the same issue. ie: ruby and rb share the same ruby issues.
If you have any questions or comments about this advisory: