CVE-2021-25993 - CVE House
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Status published Medium CVE-2021-25993

Requarks wiki.js - Stored Cross-Site Scripting (XSS) in markdown editor

Vulnerability Description

In Requarks wiki.js, versions 2.0.0-beta.147 to 2.5.255 are affected by Stored XSS vulnerability, where a low privileged (editor) user can upload a SVG file that contains malicious JavaScript while uploading assets in the page. That will send the JWT tokens to the attacker’s server and will lead to account takeover when accessed by the victim.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • WhiteSource Vulnerability Research Team (WVR)

References

More from Requarks

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CVE-2022-23654
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CVE-2021-43856
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CVE-2021-43855
Stored XSS via SVG in Requarks/wiki
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CVE-2021-43842
Stored XSS via SVG file upload in Wiki.js
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CVE-2021-43800
Asset directory traversal with some storage modules on Windows
High 7.5

Affected Vendor

Affected Software

wiki
Vulnerable Versions:
2.0.0-beta.147, unspecified

Timeline

Official Publish: December 29th, 2021
Last Modified: April 30th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-79

MITRE ATT&CK TTPs

T1189 Drive-by Compromise
Initial Access
T1059.007 JavaScript
Execution
T1539 Steal Web Session Cookie
Collection
T1213 Data from Information Repositories
Collection
T1567 Exfiltration Over Web Service
Exfiltration
T1491.001 Defacement
Impact