Description

### Impact It's possible to know if a user has or not an account in a wiki related to an email address, and which username(s) is actually tied to that email by forging a request to the Forgot username page. Note that since this page does not have a CSRF check it's quite easy to perform a lot of those requests. ### Patches This issue has been patched in XWiki 12.10.5 and 13.2RC1. Two different patches are provided: - a first one to fix the CSRF problem - a more complex one that now relies on sending an email for the Forgot username process. ### Workarounds It's possible to fix the problem without uprading by editing the ForgotUsername page in version below 13.x, to use the following code: https://github.com/xwiki/xwiki-platform/blob/69548c0320cbd772540cf4668743e69f879812cf/xwiki-platform-core/xwiki-platform-administration/xwiki-platform-administration-ui/src/main/resources/XWiki/ForgotUsername.xml#L39-L123 In version after 13.x it's also possible to edit manually the forgotusername.vm file, but it's really encouraged to upgrade the version here. ### References * https://jira.xwiki.org/browse/XWIKI-18384 * https://jira.xwiki.org/browse/XWIKI-18408 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki](https://jira.xwiki.org) * Email us at [security ML](mailto:security@xwiki.org)

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  6.5 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CNA:  GitHub, Inc.

Base Score:  7.5 HIGH

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  4.3 MEDIUM

Vector:  (AV:N/AC:M/Au:N/C:P/I:N/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/xwiki/xwiki-platform/commit/69548c0320cbd772540cf4668743e69f879812cf	Patch  Third Party Advisory
https://github.com/xwiki/xwiki-platform/commit/f0440dfcbba705e03f7565cd88893dde57ca3fa8	Patch  Third Party Advisory
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vh5c-jqfg-mhrh	Mitigation  Third Party Advisory
https://jira.xwiki.org/browse/XWIKI-18384	Exploit  Patch  Vendor Advisory
https://jira.xwiki.org/browse/XWIKI-18408	Exploit  Patch  Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-352	Cross-Site Request Forgery (CSRF)	NIST   GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

1 change records found show changes

Initial Analysis by NIST 2/10/2022 1:39:12 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:* versions up to (excluding) 12.10.5 *cpe:2.3:a:xwiki:xwiki:13.0:*:*:*:*:*:*:* *cpe:2.3:a:xwiki:xwiki:13.1:-:*:*:*:*:*:*
Added	CVSS V2		NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Added	CWE		NIST CWE-352
Changed	Reference Type	https://github.com/xwiki/xwiki-platform/commit/69548c0320cbd772540cf4668743e69f879812cf No Types Assigned	https://github.com/xwiki/xwiki-platform/commit/69548c0320cbd772540cf4668743e69f879812cf Patch, Third Party Advisory
Changed	Reference Type	https://github.com/xwiki/xwiki-platform/commit/f0440dfcbba705e03f7565cd88893dde57ca3fa8 No Types Assigned	https://github.com/xwiki/xwiki-platform/commit/f0440dfcbba705e03f7565cd88893dde57ca3fa8 Patch, Third Party Advisory
Changed	Reference Type	https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vh5c-jqfg-mhrh No Types Assigned	https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vh5c-jqfg-mhrh Mitigation, Third Party Advisory
Changed	Reference Type	https://jira.xwiki.org/browse/XWIKI-18384 No Types Assigned	https://jira.xwiki.org/browse/XWIKI-18384 Exploit, Patch, Vendor Advisory
Changed	Reference Type	https://jira.xwiki.org/browse/XWIKI-18408 No Types Assigned	https://jira.xwiki.org/browse/XWIKI-18408 Exploit, Patch, Vendor Advisory