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CVE-2026-27833— Piwigo: Unauthenticated Information Disclosure via pwg.history.search API

Quick assessment

Affected
Piwigo Piwigo
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Piwigo是Piwigo开源的一套基于Web的开源图片库软件。该软件包括图片管理、图片分类和权限管理等功能。 Piwigo 16.3.0之前版本存在安全漏洞，该漏洞源于pwg.history.search API方法未设置admin_only选项，可能导致未经验证的用户访问所有图库访客的完整浏览历史。

CVSS 7.5 · High EPSS 1.70% · P76

Public Exploits 1

Nuclei · 1 CVE-2026-27833.yaml [template]

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-27833

Vulnerability Information
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Vulnerability Title
Piwigo: Unauthenticated Information Disclosure via pwg.history.search API
Source: CVE Program / CVE List V5
Vulnerability Description
Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Piwigo 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Piwigo是Piwigo开源的一套基于Web的开源图片库软件。该软件包括图片管理、图片分类和权限管理等功能。 Piwigo 16.3.0之前版本存在安全漏洞，该漏洞源于pwg.history.search API方法未设置admin_only选项，可能导致未经验证的用户访问所有图库访客的完整浏览历史。
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
Piwigo Piwigo < 16.3.0 -

II. Public POCs for CVE-2026-27833

# POC Description Source Link Shenlong Link
1 Piwigo <= 16.3.0 contains an information disclosure vulnerability caused by the pwg.history.search API method lacking admin_only restriction, letting unauthenticated users access full browsing history, exploit requires no authentication https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27833.yaml POC Details
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Qwen3.6-35B-A3B · 7873 chars
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III. Intelligence Information for CVE-2026-27833

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Same Patch Batch · Piwigo · 2026-04-03 · 4 CVEs total

CVE-2026-27885 7.2 HIGH Piwigo: SQL Injection in Activity.getList
CVE-2026-27834 7.2 HIGH Piwigo: SQL Injection in pwg.users.getList API Method via filter Parameter
CVE-2026-27634 Piwigo: Pre-auth SQL injection via date filter parameters in ws_std_image_sql_filter

IV. Related Vulnerabilities

Same product: Piwigo
Same vendor: Piwigo
Same weakness: CWE-862

V. Comments for CVE-2026-27833

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