Administrator escalation via uploaded signature script
Published Mar 22, 2024 · Updated Aug 2, 2024
Stored XSS in FreeScout before 1.8.128 allows remote authenticated users to gain Administrator access through a crafted signature. The signature field retains a script tag referencing a JavaScript file uploaded through /conversation/upload, so the same-origin source bypasses the script-src CSP. A Support Agent account and an Administrator viewing a conversation are required; the script can submit authenticated profile changes and promote the attacker's account.
Summary
What happened
Stored XSS in FreeScout before 1.8.128 allows remote authenticated users to gain Administrator access through a crafted signature. The signature field retains a script tag referencing a JavaScript file uploaded through /conversation/upload, so the same-origin source bypasses the script-src CSP. A Support Agent account and an Administrator viewing a conversation are required; the script can submit authenticated profile changes and promote the attacker's account.
The record
- CVE
- CVE-2024-29184
- Published
- Mar 22, 2024
- Updated
- Aug 2, 2024
- Vendor
- FreeScout
- Product
- FreeScout
- Classifications
- CWE-80, CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 22, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record 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=< 1.8.128
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
- GHSA-fffc-phh8-5h4v privilege-escalation reproductionfunctional · demonstrated
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Technologies
Your stack
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Your stack
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