XSS in Wiki.js
CVE-2021-21383

7.6HIGH

Key Information:

Vendor

Requarks

Status
Wiki
Vendor
CVE Published:
18 March 2021

What is CVE-2021-21383?

Wiki.js an open-source wiki app built on Node.js. Wiki.js before version 2.5.191 is vulnerable to stored cross-site scripting through mustache expressions in code blocks. This vulnerability exists due to mustache expressions being parsed by Vue during content injection even though it is contained within a <pre> element. By creating a crafted wiki page, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the page is viewed by other users. For an example see referenced GitHub Security Advisory. Commit 5ffa189383dd716f12b56b8cae2ba0d075996cf1 fixes this vulnerability by adding the v-pre directive to all <pre> tags during the render.

Affected Version(s)

wiki < 2.5.191

References

https://github.com/Requarks/wiki/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/Requarks/wiki/commit/5ffa189383dd716f1...
x_refsource_MISC
https://github.com/Requarks/wiki/releases/tag/2.5.191
x_refsource_MISC

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.