Session-cookie theft via unvalidated event name
Published Aug 29, 2025 · Updated Aug 29, 2025
Stored XSS in OpenAtlas 8.9.0 allows remote authenticated users to steal another authenticated user's session cookie via an event name. The /insert/event handler accepts the POST name parameter without adequate validation, allowing injected script content to execute when the crafted event is viewed. The attack requires authenticated event submission and passive interaction by another authenticated user; it exposes that user's cookie and permits browser-context content changes.
Summary
What happened
Stored XSS in OpenAtlas 8.9.0 allows remote authenticated users to steal another authenticated user's session cookie via an event name. The /insert/event handler accepts the POST name parameter without adequate validation, allowing injected script content to execute when the crafted event is viewed. The attack requires authenticated event submission and passive interaction by another authenticated user; it exposes that user's cookie and permits browser-context content changes.
The record
- CVE
- CVE-2025-40708
- Published
- Aug 29, 2025
- Updated
- Aug 29, 2025
- Vendor
- Austrian Centre for Digital Humanities and Cultural Heritage
- Product
- OpenAtlas
- Classifications
- CWE-79, T1539
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 29, 2025CVE publishedPublication date reported by the CVE source.
- Aug 29, 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?
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- Affected versionversion=8.9.0
What conditions does exploitation require?
What is affected?
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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