Browser script execution via unescaped request path
Published Feb 20, 2025 · Updated Feb 21, 2025
Reflected XSS in the folder-list template in Oxyno-zeta S3-Proxy before 4.18.0 allows remote attackers to execute script via a crafted URL. The template renders Request.URL.Path directly with Go text/template, leaving injected HTML and JavaScript unescaped in the generated page. Exploitation requires a user to visit the malicious URL, after which script runs in that user's browser context and can expose session data or support phishing.
Summary
What happened
Reflected XSS in the folder-list template in Oxyno-zeta S3-Proxy before 4.18.0 allows remote attackers to execute script via a crafted URL. The template renders Request.URL.Path directly with Go text/template, leaving injected HTML and JavaScript unescaped in the generated page. Exploitation requires a user to visit the malicious URL, after which script runs in that user's browser context and can expose session data or support phishing.
The record
- CVE
- CVE-2025-27088
- Published
- Feb 20, 2025
- Updated
- Feb 21, 2025
- Vendor
- Oxyno-zeta
- Product
- S3-Proxy
- Classifications
- CWE-79, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 20, 2025CVE publishedPublication date reported by the CVE source.
- Feb 21, 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=< 4.18.0
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
- Upstream crafted-URL 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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