What’s Vulnerable › Vulnerabilities

CVE-2026-53758: Emlog: Stored XSS via Parsedown Markdown Processing - Raw HTML Not Sanitized

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-09
• Weakness: CWE-79

Description

Emlog is an open source website building system. In versions 2.6.29 and prior, article content is processed by Parsedown without enabling safe mode, which means raw HTML including <script> tags embedded in Markdown is passed through unescaped. The output is rendered with no additional sanitization, resulting in stored XSS visible to all site visitors. At time of publication, there are no publicly known patches.

Affected products

• emlog: through 2.6.29

References

• https://github.com/emlog/emlog/security/advisories/GHSA-35vc-2gv4-mw77
• https://github.com/emlog/emlog/security/advisories/GHSA-35vc-2gv4-mw77

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