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CVE-2026-45233— HTMLy CMS 3.1.1 Path Traversal via oldfile Parameter in Autosave

CVSS 8.1 · High EPSS 0.57% · P43

Affected Version Matrix 1

VendorProductVersion RangeStatus
danproshtmly≤ 3.1.1affected
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I. Basic Information for CVE-2026-45233

Vulnerability Information
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Vulnerability Title
HTMLy CMS 3.1.1 Path Traversal via oldfile Parameter in Autosave
Source: NVD (National Vulnerability Database)
Vulnerability Description
HTMLy CMS through 3.1.1 contains a path traversal vulnerability that allows low-privileged authenticated attackers to relocate arbitrary files by supplying directory traversal sequences in the oldfile parameter at the admin autosave endpoint. Attackers can pass unsanitized traversal sequences directly to file_exists() and rename() functions in admin.php without canonicalization or directory boundary enforcement to cause unintended relocation of any file writable by the web server process to an attacker-specified draft location.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
HTMLy CMS 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTMLy HTMLy CMS是HTMLy组织的一个内容管理系统。 HTMLy CMS 3.1.1及之前版本存在路径遍历漏洞，该漏洞源于路径遍历，可能导致低权限攻击者在admin autosave端点的oldfile参数中传入目录遍历序列，将未清理的遍历序列直接传递给admin.php中的file_exists()和rename()函数，未进行规范化或目录边界强制，导致任意文件被重定位到攻击者指定的草稿位置。
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

VendorProductAffected VersionsCPESubscribe
danproshtmly 0 ~ 3.1.1 -

II. Public POCs for CVE-2026-45233

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III. Intelligence Information for CVE-2026-45233

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Vendor Advisories for CVE-2026-45233 (1)

Proof of Concept for CVE-2026-45233 (1)

IV. Related Vulnerabilities

Same product: htmly
Same vendor: danpros
Same weakness: CWE-22

V. Comments for CVE-2026-45233

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