Browser script execution via inline attachment rendering
Published Aug 15, 2024 · Updated Aug 16, 2024
Cross-site scripting in Friendica 2023.12 allows remote attackers to execute script in another user's browser through an uploaded attachment. The attachment-serving path passes uploaded HTML or JavaScript through inline rather than forcing a download, so the browser interprets attacker-controlled markup. No attacker authentication is required, but a victim must open the attachment URL; the script can read session-accessible data and alter content in that user's context.
Summary
What happened
Cross-site scripting in Friendica 2023.12 allows remote attackers to execute script in another user's browser through an uploaded attachment. The attachment-serving path passes uploaded HTML or JavaScript through inline rather than forcing a download, so the browser interprets attacker-controlled markup. No attacker authentication is required, but a victim must open the attachment URL; the script can read session-accessible data and alter content in that user's context.
The record
- CVE
- CVE-2024-27731
- Published
- Aug 15, 2024
- Updated
- Aug 16, 2024
- Vendor
- Friendica
- Product
- Friendica
- Classifications
- CWE-200, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 15, 2024CVE publishedPublication date reported by the CVE source.
- Aug 16, 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=v.2023.12
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
- Friendica attachment XSS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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