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CVE-2026-17153— AI Agent by SiteGround <= 1.2.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Upload via /generate-content REST Endpoint

Quick assessment

Affected
siteground AI Agent by SiteGround
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.

siteground AI Agent by SiteGround是siteground公司的一款具备机器学习能力的云计算智能代理。 siteground AI Agent by SiteGround 1.2.7及之前版本存在授权问题漏洞，该漏洞源于未正确验证用户是否被授权执行操作，可能导致未经身份验证的攻击者上传图片到WordPress媒体库，绕过upload_files能力限制。

CVSS 5.3 · Medium EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
siteground AI Agent by SiteGround ≤ 1.2.7 affected
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I. Basic Information for CVE-2026-17153

Vulnerability Information
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Vulnerability Title
AI Agent by SiteGround <= 1.2.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Upload via /generate-content REST Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint's nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access — including Contributors — making the absent upload_files check the sole barrier to exploitation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
siteground AI Agent by SiteGround 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
siteground AI Agent by SiteGround是siteground公司的一款具备机器学习能力的云计算智能代理。 siteground AI Agent by SiteGround 1.2.7及之前版本存在授权问题漏洞，该漏洞源于未正确验证用户是否被授权执行操作，可能导致未经身份验证的攻击者上传图片到WordPress媒体库，绕过upload_files能力限制。
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
siteground AI Agent by SiteGround 0 ~ 1.2.7 -

II. Public POCs for CVE-2026-17153

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III. Intelligence Information for CVE-2026-17153

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Patches & Fixes for CVE-2026-17153 (1)

Vendor Advisories for CVE-2026-17153 (1)

IV. Related Vulnerabilities

Same vendor: siteground
Same weakness: CWE-862

V. Comments for CVE-2026-17153

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