XSS in Chaitin Pandawiki
CVE-2026-120428
PandaWiki 3.65.0 through 3.87.5 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to upload HTML files with image extensions via /share/v1/common/file/upload. Attackers can lure administrators to /static-file/<key>?a=.pdf, bypassing the nginx attachment header to serve HTML inline and steal the panda_wiki_token JWT for session takeover.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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
Weakness classification (CWE)
References
- github.com/chaitin/PandaWiki/issues/1845 (issue-tracking)
- vul.yulun.ac.cn/20261101/pandawiki/ (exploit)
- github.com/chaitin/PandaWiki/blob/v3.87.5/web/admin/server.conf (technical-description)
- github.com/chaitin/PandaWiki/blob/v3.87.5/backend/usecase/file.go (technical-description)
- github.com/chaitin/PandaWiki/blob/v3.87.5/backend/handler/share/common.go (technical-description)
- www.vulncheck.com/advisories/pandawiki-3.65.0-through-3.87.5-stored-xss-via-sta… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120428?
- CVE-2026-120428 is a medium-severity vulnerability in Chaitin Pandawiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-11-02.
- How severe is CVE-2026-120428?
- Medium severity. CVSS v3 base score is 6.1 out of 10.