Vulnerability Details : CVE-2021-21379

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.
Published 2021-03-12 18:15:13
Updated 2021-03-22 16:26:57
Source GitHub, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-21379

Exploit prediction scoring system (EPSS) score for CVE-2021-21379

EPSS FAQ
0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21379

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.5
 LOW AV:N/AC:M/Au:S/C:N/I:P/A:N
6.8
2.9
 NIST
5.4
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
2.3
2.7
 NIST
7.7
 HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
1.3
5.8
 GitHub, Inc.

CWE ids for CVE-2021-21379

  • The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.
    Assigned by: security-advisories@github.com (Primary)

References for CVE-2021-21379

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