Limited file read and write via contact XSS
Published May 27, 2026 · Updated May 27, 2026
Cross-site scripting in Synology Contacts before 1.0.10-20659 allows remote authenticated users to read or write limited files. The contact functionality places attacker-controlled input into generated web content without proper neutralization, but Synology has not disclosed a file, function, parameter, or request vector. Low-privileged access and interaction by another user are required; the bounded impact is reading or writing specific files containing non-sensitive information.
Summary
What happened
Cross-site scripting in Synology Contacts before 1.0.10-20659 allows remote authenticated users to read or write limited files. The contact functionality places attacker-controlled input into generated web content without proper neutralization, but Synology has not disclosed a file, function, parameter, or request vector. Low-privileged access and interaction by another user are required; the bounded impact is reading or writing specific files containing non-sensitive information.
The record
- CVE
- CVE-2025-13167
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- Synology
- Product
- Synology Contacts
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 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=* <1.0.10-20659
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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