Stored XSS via unsanitized translated content
Published Sep 19, 2023 · Updated Sep 24, 2024
Stored XSS in Mastodon before 4.0.10, 4.1.8, and 4.2.0-rc2 allows remote attackers to execute unescaped HTML through translation. TranslateStatusService converted translator-supplied status content to HTML without applying the MASTODON_STRICT sanitizer. A victim must click Translate on a malicious post, and the browser's Content Security Policy limits impact unless an attacker also bypasses it.
Summary
What happened
Stored XSS in Mastodon before 4.0.10, 4.1.8, and 4.2.0-rc2 allows remote attackers to execute unescaped HTML through translation. TranslateStatusService converted translator-supplied status content to HTML without applying the MASTODON_STRICT sanitizer. A victim must click Translate on a malicious post, and the browser's Content Security Policy limits impact unless an attacker also bypasses it.
The record
- CVE
- CVE-2023-42452
- Published
- Sep 19, 2023
- Updated
- Sep 24, 2024
- Vendor
- Mastodon
- Product
- Mastodon
- Classifications
- CWE-79
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 19, 2023CVE publishedPublication date reported by the CVE source.
- Sep 24, 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=>= 4.0.0, < 4.0.10
- Affected versionversion=>= 4.1.0, < 4.1.8
- Affected versionversion=>= 4.2.0-beta1, < 4.2.0-rc2
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.
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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