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CVE-2021-21379

HIGH
Published 2021-03-12T17:30:15
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CVSS Score

V3.1
7.7
/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.623
Higher than 62.3% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions of XWiki Platform, the `{{wikimacrocontent}}` executes the content with the rights of the wiki macro author instead of the caller of that wiki macro. This makes possible to inject scripts through it and they will be executed with the rights of the wiki macro (very often a user which has Programming rights). Fortunately, no such macro exists by default in XWiki Standard but one could have been created or installed with an extension. This vulnerability has been patched in versions XWiki 12.6.3, 11.10.11 and 12.8-rc-1. There is no easy workaround other than disabling the affected macros. Inserting content in a safe way or knowing what is the user who called the wiki macro is not easy.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed LOW

It's possible to execute anything with the rights of the author of a macro which uses the {{wikimacrocontent}} macro

GHSA-v662-xpcc-9xf6

Advisory Details

### Impact The `{{wikimacrocontent}}` executes the content with the rights of the wiki macro author instead of the caller of that wiki macro. This makes possible to inject scripts through it and they will be executed with the rights of the wiki macro (very often a user which has Programming rights). Fortunately, no such macro exists by default in XWiki Standard but one could have been created or installed with an extension. ### Patches It has been patched in versions XWiki 12.6.3, 11.10.11 and 12.8-rc-1. ### Workarounds There is no easy workaround other than disabling the affected macros. Inserting content in a safe way or knowing what is the user who called the wiki macro is not easy. ### References https://jira.xwiki.org/browse/XWIKI-17759 ### 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 [our security mailing list](mailto:[email protected])

Affected Packages

Maven org.xwiki.platform:xwiki-platform-rendering-wikimacro-store
ECOSYSTEM: ≥11.4 <11.10.11
Maven org.xwiki.platform:xwiki-platform-rendering-wikimacro-store
ECOSYSTEM: ≥12.0 <12.6.3
Maven org.xwiki.platform:xwiki-platform-rendering-wikimacro-store
ECOSYSTEM: ≥12.7 <12.8

CVSS Scoring

CVSS Score

2.5

Advisory provided by GitHub Security Advisory Database. Published: March 23, 2021, Modified: March 23, 2021

References

Published: 2021-03-12T17:30:15
Last Modified: 2024-08-03T18:09:15.922Z
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