---
id: CVE-2026-73848
title: Emlog is an open source website building system
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
  addslas…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-79
vendor: emlog
product: emlog
affected:
  - emlog <= 2.6.29
published: '2026-09-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:05:26.920'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73848'
references:
  - url: 'https://github.com/emlog/emlog/security/advisories/GHSA-fv6h-wr92-v4pj'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00444
epssPercentile: 0.35952
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T16:50:24.354497Z'
cvssSource: cna
ingestedAt: '2026-09-08T19:08:49.594Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.