HTML injection via decoded escaped entities
Published Feb 22, 2024 · Updated Aug 22, 2024
HTML injection in Felix Schwarz mjml-python 0.10.0 allows remote authenticated users to inject markup into rendered email content. The mjml2html parser disables BeautifulSoup output formatting, converting escaped tag delimiters in MJML element content into active HTML. Exploitation requires control of data inserted into an MJML template and a recipient who opens the generated email, allowing attacker-controlled email content to render.
Summary
What happened
HTML injection in Felix Schwarz mjml-python 0.10.0 allows remote authenticated users to inject markup into rendered email content. The mjml2html parser disables BeautifulSoup output formatting, converting escaped tag delimiters in MJML element content into active HTML. Exploitation requires control of data inserted into an MJML template and a recipient who opens the generated email, allowing attacker-controlled email content to render.
The record
- CVE
- CVE-2024-26151
- Published
- Feb 22, 2024
- Updated
- Aug 22, 2024
- Vendor
- Felix Schwarz
- Product
- mjml-python
- Classifications
- CWE-79, CWE-20
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 22, 2024CVE publishedPublication date reported by the CVE source.
- Aug 22, 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 <0.11.0
- Affected versionversion== 0.10.0
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
- Escaped HTML tags rendering reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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