Medium severity · published Oct 2, 2026
CVE-2026-104465
YesWiki before 4.6.7 Reflected XSS via field Parameter in mail Handler
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the field parameter of the mail handler. Attackers can craft links whose field value breaks out of the ajax-mail-form action attribute to execute JavaScript in victims' browsers.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YE
yeswiki · YesWiki
before 4.6.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104465
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104465
vendor-advisory
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-2fc6-rvp3-fgfj
third-party-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-reflected-xss-via-field-parameter-in-mail-handler
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