CVE-2021-43855 is a stored cross-site scripting (XSS) vulnerability affecting Wiki.js versions 2.5.263 and earlier. An authenticated attacker can upload a specially crafted SVG file with a fake MIME type, leading to the execution of malicious JavaScript when other users view the SVG directly. This vulnerability has a CVSS score of 5.4 (Medium), indicating a network-based attack with low privileges, requiring user interaction, and resulting in low confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog. A patch in version 2.5.264 addresses this by enhancing SVG file extension verification.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.5.264CPE matchmatch criteria | cpe:2.3:a:requarks:wiki.js:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
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