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CVE-2026-73848— Emlog: Stored XSS via Tag Name in Article Editor

Quick assessment

Affected
emlog emlog
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

emlog是emlog团队开源的一款轻量级博客内容管理系统。 emlog 2.6.29及之前版本存在跨站脚本漏洞，该漏洞源于文章编辑器渲染标签时未对标签名进行HTML编码，导致攻击者可构造特制标签，在浏览器中执行任意代码。

CVSS 6.9 · Medium EPSS 0.44% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
emlog emlog <= 2.6.29 affected
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I. Basic Information for CVE-2026-73848

Vulnerability Information
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Vulnerability Title
Emlog: Stored XSS via Tag Name in Article Editor
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
emlog 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
emlog是emlog团队开源的一款轻量级博客内容管理系统。 emlog 2.6.29及之前版本存在跨站脚本漏洞，该漏洞源于文章编辑器渲染标签时未对标签名进行HTML编码，导致攻击者可构造特制标签，在浏览器中执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
emlog emlog <= 2.6.29 -

II. Public POCs for CVE-2026-73848

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III. Intelligence Information for CVE-2026-73848

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Vendor Advisories for CVE-2026-73848 (1)

Same Patch Batch · emlog · 2026-09-04 · 4 CVEs total

CVE-2026-53758 8.7 HIGH Emlog: Stored XSS via Parsedown Markdown Processing - Raw HTML Not Sanitized
CVE-2026-53757 6.9 MEDIUM Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE
CVE-2026-53756 4.9 MEDIUM Emlog Blind SQL Injection via Authentication Cookie

IV. Related Vulnerabilities

Same product: emlog
Same vendor: emlog
Same weakness: CWE-79

V. Comments for CVE-2026-73848

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