Authenticated account takeover via unencoded stored page data
Published Apr 1, 2026 · Updated Apr 1, 2026
Stored DOM XSS in CI4MS before 0.31.0.0 allows remote authenticated users to execute script through page data added to navigation menus. The Menu Management module stores user-controlled data selected in its Pages section and later inserts it into administrative and public navigation views without output encoding. Any low-privileged role that can add Pages can persist the payload; subsequent rendering runs it in a viewer's browser, enabling session compromise and privilege escalation.
Summary
What happened
Stored DOM XSS in CI4MS before 0.31.0.0 allows remote authenticated users to execute script through page data added to navigation menus. The Menu Management module stores user-controlled data selected in its Pages section and later inserts it into administrative and public navigation views without output encoding. Any low-privileged role that can add Pages can persist the payload; subsequent rendering runs it in a viewer's browser, enabling session compromise and privilege escalation.
The record
- CVE
- CVE-2026-34564
- Published
- Apr 1, 2026
- Updated
- Apr 1, 2026
- Vendor
- Ci4MS
- Product
- CI4MS
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 1, 2026CVE publishedPublication date reported by the CVE source.
- Apr 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.31.0.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA-g4pp-fhgf-8653 stored-XSS proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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