User-assisted code execution via reflected OAuth2 callback
Published Jan 5, 2023 · Updated Mar 10, 2025
Reflected XSS in Nuxeo Platform 11.5.109 allows context-dependent attackers to execute server-side code through a crafted OAuth2 callback. The callback omits an explicit response type, so Jersey honors the attacker-controlled Accept header and renders the service-provider path as unescaped HTML. A logged-in user must visit the crafted URL; the injected script can then call the authenticated RunScript automation endpoint under that user's session.
Summary
What happened
Reflected XSS in Nuxeo Platform 11.5.109 allows context-dependent attackers to execute server-side code through a crafted OAuth2 callback. The callback omits an explicit response type, so Jersey honors the attacker-controlled Accept header and renders the service-provider path as unescaped HTML. A logged-in user must visit the crafted URL; the injected script can then call the authenticated RunScript automation endpoint under that user's session.
The record
- CVE
- CVE-2021-32828
- Published
- Jan 5, 2023
- Updated
- Mar 10, 2025
- Vendor
- Hyland
- Product
- Nuxeo
- Classifications
- CWE-79, CWE-502, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 5, 2023CVE publishedPublication date reported by the CVE source.
- Mar 10, 2025Record 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=11.5.109 <=11.5.109
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
- OAuth2 callback and RunScript proof of conceptproof of concept · demonstrated
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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