Vulnerability Details : CVE-2021-32735
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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-32735
- cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-32735
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 17 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32735
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
|
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
2.3
|
2.7
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
2.8
|
4.2
|
GitHub, Inc. |
CWE ids for CVE-2021-32735
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
-
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2021-32735
-
https://github.com/getkirby/kirby/security/advisories/GHSA-2f2w-349x-vrqm
Cross-site scripting (XSS) from field and configuration text displayed in the Panel · Advisory · getkirby/kirby · GitHubPatch;Release Notes;Third Party Advisory
-
https://github.com/getkirby/kirby/releases/tag/3.5.7
Release 3.5.7 · getkirby/kirby · GitHubPatch;Release Notes;Third Party Advisory
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