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CVE-2026-9626— JSON API User <= 4.1.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'content' Parameter

Quick assessment

Affected
parorrey JSON API User
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.

parorrey json api user是parorrey个人开发者开源的一个为WordPress提供JSONAPI的用户管理插件。 WordPress JSON API User 4.1.0及之前版本存在跨站脚本漏洞，该漏洞源于post_comment API端点中'content'参数输入清理不足，导致容易受到存储型跨站脚本攻击，经过身份验证的攻击者可在页面中注入任意Web脚本。

CVSS 6.4 · Medium EPSS 0.38% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
parorrey JSON API User ≤ 4.1.0 affected
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I. Basic Information for CVE-2026-9626

Vulnerability Information
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Vulnerability Title
JSON API User <= 4.1.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'content' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The JSON API User plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter of the post_comment API endpoint in versions up to, and including, 4.1.0 This is due to insufficient input sanitization in the post_comment() function, which passes the attacker-controlled comment_content value directly to wp_insert_comment() without applying any HTML sanitization, and additionally allows the caller to set comment_approved=1 to self-approve the comment and bypass moderation. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A: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
WordPress JSON API User 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
parorrey json api user是parorrey个人开发者开源的一个为WordPress提供JSONAPI的用户管理插件。 WordPress JSON API User 4.1.0及之前版本存在跨站脚本漏洞，该漏洞源于post_comment API端点中'content'参数输入清理不足，导致容易受到存储型跨站脚本攻击，经过身份验证的攻击者可在页面中注入任意Web脚本。
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
parorrey JSON API User 0 ~ 4.1.0 -

II. Public POCs for CVE-2026-9626

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III. Intelligence Information for CVE-2026-9626

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Patches & Fixes for CVE-2026-9626 (2)

Vendor Advisories for CVE-2026-9626 (1)

IV. Related Vulnerabilities

Same product: JSON API User
Same vendor: parorrey
Same weakness: CWE-79

V. Comments for CVE-2026-9626

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