CVE-2021-3313: XSS
First published: Thu May 20 2021(Updated: )
Plone CMS until version 5.2.4 has a stored Cross-Site Scripting (XSS) vulnerability in the user fullname property and the file upload functionality. The user's input data is not properly encoded when being echoed back to the user. This data can be interpreted as executable code by the browser and allows an attacker to execute JavaScript in the context of the victim's browser if the victim opens a vulnerable page containing an XSS payload.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Plone Plone | <5.2.4 | |
| pip/plone | <5.2.4 | 5.2.4 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/05/22/1
- https://plone.org/download/releases/5.2.3
- https://plone.org/security/hotfix/20210518
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-07_CSNC-2021-013_XSS_in_Plone_CMS.txt
- https://nvd.nist.gov/vuln/detail/CVE-2021-3313
- https://plone.org/security/hotfix/20210518/stored-xss-from-file-upload-svg-html
- https://plone.org/security/hotfix/20210518/stored-xss-from-user-fullname
- https://github.com/advisories/GHSA-hprr-4vfq-fcxw (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2021-78.yaml
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2021-3313.
What is the severity of CVE-2021-3313?
The severity of CVE-2021-3313 is medium with a CVSS score of 5.4.
What is the affected software for CVE-2021-3313?
The affected software for CVE-2021-3313 is Plone CMS up to version 5.2.4.
What is the CWE ID associated with CVE-2021-3313?
The CWE ID associated with CVE-2021-3313 is CWE-79.
How can I fix the CVE-2021-3313 vulnerability?
To fix the CVE-2021-3313 vulnerability, update Plone CMS to version 5.2.4 or higher.
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