What is CVE-2026-104473?

CVE-2026-104473 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-02.

How severe is CVE-2026-104473?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Yeswiki

CVE-2026-104473

YesWiki before 4.5.3 contains multiple reflected cross-site scripting vulnerabilities that allow remote attackers to inject JavaScript through unsanitized parameters such as incomingurl, id, file, tags, and template. Attackers can lure authenticated or unauthenticated users into opening crafted links to hijack sessions and trigger authenticated requests against backend functionality.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yeswiki

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-5724-x3rh-5qqq (vendor-advisory)
www.vulncheck.com/advisories/yeswiki-before-4.5.3-multiple-reflected-xss-via-ba… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104473?: CVE-2026-104473 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-02.
How severe is CVE-2026-104473?: Medium severity. CVSS v3 base score is 6.1 out of 10.