Credential theft via unsanitized received-email markup
Published May 13, 2024 · Updated Aug 2, 2024
Stored HTML injection in FreeScout before 1.8.139 allows remote attackers to plant malicious markup through inbound mailbox email. The received-thread editor rendered thread body content inside edit_thread after sanitizing the completed view, leaving attacker-supplied tags active in the application's origin. Exploitation requires a FreeScout user to edit the received message; injected forms can capture submitted credentials, and CSS can exfiltrate data or deface the page.
Summary
What happened
Stored HTML injection in FreeScout before 1.8.139 allows remote attackers to plant malicious markup through inbound mailbox email. The received-thread editor rendered thread body content inside edit_thread after sanitizing the completed view, leaving attacker-supplied tags active in the application's origin. Exploitation requires a FreeScout user to edit the received message; injected forms can capture submitted credentials, and CSS can exfiltrate data or deface the page.
The record
- CVE
- CVE-2024-34697
- Published
- May 13, 2024
- Updated
- Aug 2, 2024
- Vendor
- FreeScout
- Product
- FreeScout
- Classifications
- CWE-74, T1056.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 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=0 <1.8.139
- Affected versionversion=< 1.8.139
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
- GitHub advisory malicious-email reproductionproof 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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