GHSA-28h4-788g-rh42
Craft CMS vulnerable to stored XSS in breadcrumb list and title fields
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | craftcms/cms | >= 5.0.0, < 5.1.2 | 5.1.2 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Summary
Multiple Stored XSS can be triggered by the breadcrumb list and title fields with user input.
### Details
1. In the **/admin/categories** page, category title isn't sanitized and triggered xss.
2. In the category edit page under the **/admin/categories/**, category title in breadcrumb list isn't sanitized and triggered xss.
3. In the **/admin/entries** page, entry title isn't sanitized and triggered xss.
4. In the entry edit page under the **/admin/entries/**, entry title in breadcrumb list isn't sanitized and triggered xss.
5. In the **/admin/myaccount** and pages under it, username or full name in breadcrumb list isn't sanitized and triggered xss.
### Impact
Malicious users can tamper with the control panel.
### PoC
#### 1. In the **/admin/categories** page, category title isn't sanitized and triggered xss.
```
1. Access to the Settings -> Categories ( /admin/settings/categories )
2. Create new category group
3. Access to the Categories page ( /admin/categories/ )
4. Push the New category button
5. Input the Title column : xss<script>alert('xss')</script>
6. Push the Create Category or Save button
7. Access to the Categories page again and it triggers xss
```



#### 2. In the category edit page under the **/admin/categories/**, category title in breadcrumb list isn't sanitized and triggered xss.
```
1. Access to the Settings -> Categories ( /admin/settings/categories )
2. Create new category group
3. Access to the Categories page ( /admin/categories/ )
4. Push the New category button
5. Input the Title column : xss<script>alert('xss')</script>
6. Push the Create Category or Save button
7. Access to the Category edit page again and it triggers xss
```



#### 3. In the **/admin/entries** page, entry title isn't sanitized and triggered xss.
```
1. Access to the Settings -> Entry Types ( /admin/settings/entry-types )
2. Create new entry type
3. Access to the Settings -> Sections ( /admin/settings/sections )
4. Create new section
5. Access to the Entries page ( /admin/entries )
6. Push the New entry button
7. Input the Title column : xss<script>alert('xss')</script>
8. Push the Create entry or Save button
9. Access to the Entries page again and it triggers xss
```



#### 4. In the entry edit page under the **/admin/entries/**, entry title in breadcrumb list isn't sanitized and triggered xss.
```
1. Access to the Settings -> Entry Types ( /admin/settings/entry-types )
2. Create new entry type
3. Access to the Settings -> Sections ( /admin/settings/sections )
4. Create new section
5. Access to the Entries page ( /admin/entries )
6. Push the New entry button
7. Input the Title column : xss<script>alert('xss')</script>
8. Push the Create entry or Save button
9. Access to the Entriy edit page again and it triggers xss
```



#### 5. In the **/admin/myaccount** and pages under it, username or full name in breadcrumb list isn't sanitized and triggered xss.
```
1. Access to the My Account Page ( /admin/myaccount )
2. Input the Full Name column : xss<script>alert('xss')</script>
3. Push the the Save button
4. Access to the My Account page ( /admin/myaccount ) or pages under it ( /admin/myaccount/addresses , /admin/myaccount/preferences , etc.) and it triggers xss
```



References
External links from the advisory. They lead to third-party sites.