Read the docs
TI-2026-51871 Aliases CVE-2026-73848

Emlog: Stored XSS via Tag Name in Article Editor

Priority LOW 37CWE-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 · Low · 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, tag names in emlog are not HTML-encoded when rendered in the article editor. An attacker can create a tag containing ');alert(document.domain);//. The addslashes() function does not escape HTML entities, so ' is stored as-is. When the browser renders the page, it decodes ' back to a literal single quote before evaluating the JavaScript, breaking out of the string and executing arbitrary code. At time of publication, there are no publicly known patches.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00444 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
None
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-2026-73848

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