Advisory Details

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

The specific flaw exists within the saveXmlFile method. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM.

02/13/23 – The ZDI requested a vendor PSIRT contact.

02/14/23 – The vendor provided PSIRT Contact information.

02/14/23 – The ZDI reported the vulnerability to the vendor.

08/04/23 – The ZDI asked for an update.

08/08/23 – The vendor states that they do not have plans to fix the vulnerability now or in the future.

08/21/23 – The ZDI informed the vendor that we are publishing the case as a zero-day advisory on 08/24/23.

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

• 2023-02-14 - Vulnerability reported to vendor
• 2023-08-24 - Coordinated public release of advisory