(0Day) PublicCMS getXml Server-Side Request Forgery Information Disclosure Vulnerability

April 21st, 2026
ZDI-26-295 ZDI-CAN-23734

CVE ID

CVSS Score

8.2 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected Vendors

PublicCMS

Affected Products

PublicCMS

Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on affected installations of PublicCMS. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the getXml method. The issue results from the lack of authorization prior to allowing access to functionality. An attacker can leverage this vulnerability to disclose information in the context of the application.

Additional Details

4/26/24 - ZDI reported the vulnerability to the vendor
8/21/24 – ZDI asked for updates
11/10/25 - ZDI asked for updates
04/17/26 - ZDI notified the vendor of the intention to publish the case as a 0-day advisory

-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product


Disclosure Timeline

  • 2024-04-26 - Vulnerability reported to vendor
  • 2026-04-21 - Coordinated public release of advisory
  • 2026-04-21 - Advisory Updated

Credit

Vinicius Ribeiro Ferreira da Silva

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