CVE-2021-25993: Requarks wiki.js - Stored Cross-Site Scripting (XSS) in markdown editor

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-29 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Requarks wiki: from 2.0.1 through 2.5.255; 2.0.0-beta147, 2.0.0-beta148, 2.0.0-beta174, 2.0.0-beta180, 2.0.0-beta203, 2.0.0-beta208 (+8)

References

https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25993
https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25993

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