Unauthenticated XXE in SysAid On-Prem Checkin Processing
CVE-2025-2775 is an unauthenticated XML External Entity (XXE) vulnerability in the Checkin processing functionality of SysAid On-Prem. Affected versions are 23.3.40 and earlier. The flaw allows a remote attacker to submit crafted XML that is parsed unsafely, enabling external entity resolution during Checkin request processing. According to the provided content, successful exploitation yields arbitrary file-read primitives and can expose sensitive local files, including an installation-created file containing the main administrator’s clear-text password, which in turn can lead to administrator account takeover. The content also notes that the XXE behavior may enable SSRF, and that this issue is one of several related pre-auth XXE flaws in SysAid’s XML parsing logic.
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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
40 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 vulnerability affecting SysAid, referenced as exploited in the wild (no technical details provided in the content).
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.