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TI-2026-38765 Aliases CVE-2026-53758

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

Priority HIGH 77CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00436 38th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
emlogemlogup to 2.6.29—No fix listedCNA
  • emlog Vendoremlog Affected up to 2.6.29 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:emlog:emlog:*:*:*:*:*:*:*:*——emlog
  • cpe:2.3:a:emlog:emlog:*:*:*:*:*:*:*:* Versions — — ·emlog

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53758

References

Other 1

  • TI-2026-51872 emlog allows unauthenticated reinstallation via `install.php?action=reinstall`. CVSS 3.1CRITICAL 9.8
  • TI-2026-30598 Emlog: SQL Injection Vulnerability in log_model.php within addLog() and updateLog() Functions CVSS 4.0CRITICAL 10.0
  • TI-2025-21066 An arbitrary file upload vulnerability in the component /views/plugin.php of emlog pro… CVSS 3.1CRITICAL 9.8
  • TI-2025-19139 An arbitrary file upload vulnerability in the component admin\plugin.php of Emlog Pro… CVSS 3.1CRITICAL 9.8
  • TI-2023-24041 An arbitrary file upload vulnerability in the component /admin/plugin.php of Emlog Pro… CVSS 3.1CRITICAL 9.8
  • TI-2023-23173 Deserialization of Untrusted Data in emlog pro v.2.1.15 and earlier allows a remote… CVSS 3.1CRITICAL 9.8
See all 105 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences