xwiki/xwiki-platform · Security
Cross-site Scripting by SVG upload in xwiki-platform
- GHSA ID
- GHSA-9jq9-c2cv-pcrj
- CVE ID
- CVE-2021-43841
- Severity
- medium
- Published
- Updated
- CVSS
- 4.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
- CVSS v3
- 4.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
Description
Impact
When using default XWiki configuration, it's possible for an attacker to upload an SVG containing a script executed when executing the download action on the file.
Patches
This problem has been patched so that the default configuration doesn't allow to display the SVG files in the browser.
Workarounds
This issue can be fixed without the patch by setting properly the configuration to download or display files, see: https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/Attachments#HAttachmentdisplayordownload
References
https://jira.xwiki.org/browse/XWIKI-18368
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira
- Email us at security ML
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-9jq9-c2cv-pcrj ↗
- https://nvd.nist.gov/vuln/detail/CVE-2021-43841 ↗
- https://github.com/xwiki/xwiki-platform/commit/5853d492b3a274db0d94d560e2a5ea988a271c62 ↗
- https://jira.xwiki.org/browse/XWIKI-18368 ↗
- https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/Attachments#HAttachmentdisplayordownload ↗
- https://github.com/advisories/GHSA-9jq9-c2cv-pcrj ↗