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CVE-2026-11354— Participants Database <= 2.7.8.3 - Missing Authorization to Unauthenticated Arbitrary Record Update / Sensitive Information Exposure via 'id' Parameter

Quick assessment

Affected
xnau Participants Database
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.

xnau participants database是xnau个人开发者开源的一个参与者信息管理数据库插件。 xnau participants database 2.7.8.3及之前版本存在授权问题漏洞，该漏洞源于通过'id'参数容易受到敏感信息暴露，可能导致未经验证的攻击者覆盖任意参与者记录并获取个人敏感信息。

CVSS 5.3 · Medium EPSS 0.42% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
xnau Participants Database ≤ 2.7.8.3 affected
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I. Basic Information for CVE-2026-11354

Vulnerability Information
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Vulnerability Title
Participants Database <= 2.7.8.3 - Missing Authorization to Unauthenticated Arbitrary Record Update / Sensitive Information Exposure via 'id' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Participants Database plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.7.8.3 via the 'id' parameter. This makes it possible for unauthenticated attackers to overwrite arbitrary participant records by numeric ID and redirect the private_id-bearing record-access link to an attacker-controlled email address, granting full read and edit access to the victim's stored personally identifiable information including names, email addresses, phone numbers, and any other fields collected in the participant database. An attacker can harvest a valid nonce with a plain unauthenticated GET request to any page rendering the public signup or record form, then POST action=update with an arbitrary id value to overwrite any record; chaining a subsequent action=retrieve then delivers the private-access link to the attacker-controlled mailbox.
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
xnau participants database 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xnau participants database是xnau个人开发者开源的一个参与者信息管理数据库插件。 xnau participants database 2.7.8.3及之前版本存在授权问题漏洞，该漏洞源于通过'id'参数容易受到敏感信息暴露，可能导致未经验证的攻击者覆盖任意参与者记录并获取个人敏感信息。
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
xnau Participants Database 0 ~ 2.7.8.3 -

II. Public POCs for CVE-2026-11354

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III. Intelligence Information for CVE-2026-11354

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Patches & Fixes for CVE-2026-11354 (1)

Vendor Advisories for CVE-2026-11354 (1)

Other References for CVE-2026-11354 (1)

IV. Related Vulnerabilities

Same product: Participants Database
Same weakness: CWE-862

V. Comments for CVE-2026-11354

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