Unauthenticated XXE in SysAid On-Prem lshw Processing
CVE-2025-2777 is an unauthenticated XML External Entity (XXE) vulnerability affecting SysAid On-Prem versions 23.3.40 and earlier. The flaw is present in the lshw processing functionality, including the /lshw endpoint, where attacker-supplied XML is parsed unsafely. A remote, unauthenticated attacker can send a crafted HTTP POST request containing malicious XML entities and cause the application to resolve external entities or process local resources. According to the provided reporting, this issue is one of several pre-auth XXE flaws in SysAid that stem from the same underlying XML parsing weakness. Successful exploitation can provide file-read primitives, including access to an installation-created file containing the main administrator's clear-text password, and can enable administrator account takeover. The broader reporting also notes that XXE in this product family may enable SSRF behavior and, when chained with CVE-2025-2778 or in some reporting CVE-2024-36394, may contribute to full remote code execution, but CVE-2025-2777 itself is specifically described here as an XXE leading to admin takeover and file disclosure.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a Python proof-of-concept exploit for a pre-authentication remote code execution (RCE) chain affecting SysAid Server (versions <= 23.3.40), targeting CVE-2025-2775 through CVE-2025-2778. The exploit leverages a chained attack: it first uses an XXE vulnerability to leak admin credentials from a file on the target server, then logs in as the admin, and finally abuses a command injection flaw in the 'javaLocation' parameter of API.jsp to execute arbitrary commands supplied by the attacker. The exploit requires the attacker to run a local HTTP server (on port 80) to serve a malicious DTD and receive exfiltrated data. The main code file, 'watchTowr-vs-SysAid-PreAuth-RCE-Chain.py', is the entry point and orchestrates the entire attack chain. The README provides usage instructions, affected versions, and references. The exploit is a functional PoC and demonstrates full compromise of the target system if successful.
Affected products & vendors
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Recent activity
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
SysAid XML External Entity (XXE) vulnerability referenced as part of observed scanning payload tags.
A SysAid on-premises XXE vulnerability referenced as a scanning target.
One of several SysAid on-premise XXE vulnerabilities that can be exploited for pre-auth remote code execution with elevated privileges.
A pre-authentication XXE vulnerability in SysAid's /lshw endpoint, disclosed alongside the other SysAid XXE flaws and addressed in the same fixed release.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.