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Security Advisories: GSA_kwCzR0hTQS14Mzd2LTM2d3YtNnY2aM4AAy5a
Cross-site Scripting in org.xwiki.commons:xwiki-commons-xml
Impact
The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid HTML comments. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). An example are anonymous comments in XWiki where the HTML macro filters HTML using restricted mode:
{{html}}
<!--> <Details Open OnToggle=confirm("XSS")>
{{/html}}
When a privileged user with programming rights visits such a comment in XWiki, the malicious JavaScript code is executed in the context of the user session. This allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance.
Note that while all versions since 4.2-milestone-1 should be vulnerable, only starting with version 14.6-rc-1 the HTML comment is necessary for the attack to succeed due to another vulnerability that has been patched in version 14.6-rc-1.
Patches
This problem has been patched in XWiki 14.10, HTML comments are now removed in restricted mode and a check has been introduced that ensures that comments don't start with >
.
Workarounds
There are no known workarounds apart from upgrading to a version including the fix.
References
- https://jira.xwiki.org/browse/XCOMMONS-2568
- https://jira.xwiki.org/browse/XWIKI-20348
- https://github.com/xwiki/xwiki-commons/commit/8ff1a9d7e5d7b45b690134a537d53dc05cae04ab
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki
- Email us at XWiki Security mailing-list
Attribution
This vulnerability was reported on Intigriti by ynoof @Ynoof5.
Permalink: https://github.com/advisories/GHSA-x37v-36wv-6v6hJSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS14Mzd2LTM2d3YtNnY2aM4AAy5a
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: about 1 year ago
Updated: 6 months ago
CVSS Score: 9.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Identifiers: GHSA-x37v-36wv-6v6h, CVE-2023-29528
References:
- https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-x37v-36wv-6v6h
- https://nvd.nist.gov/vuln/detail/CVE-2023-29528
- https://github.com/xwiki/xwiki-commons/commit/8ff1a9d7e5d7b45b690134a537d53dc05cae04ab
- https://jira.xwiki.org/browse/XCOMMONS-2568
- https://jira.xwiki.org/browse/XWIKI-20348
- https://github.com/advisories/GHSA-x37v-36wv-6v6h
Blast Radius: 17.2
Affected Packages
maven:org.xwiki.commons:xwiki-commons-xml
Dependent packages: 10Dependent repositories: 77
Downloads:
Affected Version Ranges: >= 4.2-milestone-1, < 14.10
Fixed in: 14.10
All affected versions: 12.10.11, 13.4.6, 13.4.7, 13.10.2, 13.10.3, 13.10.4, 13.10.5, 13.10.6, 13.10.7, 13.10.8, 13.10.9, 13.10.10, 13.10.11, 14.2.1, 14.3.1, 14.4.1, 14.4.2, 14.4.3, 14.4.4, 14.4.5, 14.4.6, 14.4.7, 14.4.8
All unaffected versions: 14.10.1, 14.10.2, 14.10.3, 14.10.4, 14.10.5, 14.10.6, 14.10.7, 14.10.8, 14.10.9, 14.10.10, 14.10.11, 14.10.12, 14.10.13, 14.10.14, 14.10.15, 14.10.16, 14.10.17, 14.10.18, 14.10.19, 14.10.20, 14.10.21, 15.5.1, 15.5.2, 15.5.3, 15.5.4, 15.5.5, 15.10.1, 15.10.2, 15.10.3, 15.10.4, 15.10.5, 15.10.6, 15.10.7, 15.10.8, 16.0.0, 16.1.0, 16.2.0