Vulnerability · Published Jul 2, 2021 · Assigned by GitHub_M
CVE-2021-32735Cross-site scripting (XSS) from field and configuration text displayed in the Panel
High 7.1
In plain English
A high-severity security flaw in kirby from getkirby. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Kirby is a content management system. In Kirby CMS versions 3.5.5 and 3.5.6, the Panel's `ListItem` component (used in the pages and files section for example) displayed HTML in page titles as it is. This could be used for cross-site scripting (XSS) attacks. Malicious authenticated Panel users can escalate their privileges if they get access to the Panel session of an admin user. Visitors without Panel access can use the attack vector if the site allows changing site data from a frontend form. Kirby 3.5.7 patches the vulnerability. As a partial workaround, site administrators can protect against attacks from visitors without Panel access by validating or sanitizing provided data from the frontend form.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | getkirby/cms | 3.5.7 | GHSA-2f2w-349x-vrqm |
Affected products (as reported)
Weakness: CWE-80 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
References
- https://github.com/getkirby/kirby/security/advisories/GHSA-2f2w-349x-vrqm x_refsource_CONFIRM
- https://github.com/getkirby/kirby/releases/tag/3.5.7 x_refsource_MISC