EUVD-2026-50569
GHSA-h39x-gxcq-jm2v
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Unauthenticated network-reachable endpoint parses attacker XML with no user interaction, yielding arbitrary file read (C:H) with no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Jinher OA C6 contains an XML External Entity (XXE) injection vulnerability in the /c6/JHSoft.Web.HrmAttendance/sp_manager_getUserlist.aspx/GetXmlHttp endpoint. An unauthenticated remote attacker can send a crafted XML payload to read arbitrary files from the server via an out-of-band attack.
AnalysisAI
Arbitrary file disclosure in Jinher OA C6 allows unauthenticated remote attackers to read sensitive server files through an XML External Entity flaw in the HrmAttendance sp_manager_getUserlist.aspx GetXmlHttp endpoint, which parses attacker-supplied XML without disabling external entity resolution. Because the attack is unauthenticated (PR:N) and network-reachable (AV:N), a crafted XML payload triggers an out-of-band request that exfiltrates file contents. A public proof-of-concept exists in a GitHub repository, though it is not listed in CISA KEV and EPSS remains low (0.25%), indicating publicly available exploit code but no confirmed active exploitation.
Technical ContextAI
The vulnerability stems from CWE-611 (Improper Restriction of XML External Entity Reference). The affected .aspx endpoint is part of Jinher OA C6, an ASP.NET-based collaborative office automation (OA) suite widely used in Chinese enterprise and government environments. The GetXmlHttp handler accepts XML input and processes it with an XML parser that resolves external DTD entities (e.g., SYSTEM 'file://...'), enabling an attacker to define an external entity pointing at local files and have their contents included in parsed output or exfiltrated. The description specifies an out-of-band (OOB) technique, meaning the parser is also permitted to make outbound network requests to attacker-controlled infrastructure, which is used to leak file data even when the response is not directly reflected (blind XXE).
RemediationAI
No vendor-released patch identified at time of analysis; no fix version is present in the provided data, and no official Jinher advisory is referenced (only NVD and a third-party POC repository). As specific compensating controls: restrict network access to the /c6/JHSoft.Web.HrmAttendance/sp_manager_getUserlist.aspx/GetXmlHttp endpoint at the reverse proxy or WAF, ideally blocking the entire HrmAttendance path if the attendance module is unused (trade-off: breaks attendance-management functionality); add a WAF rule to reject XML request bodies containing DOCTYPE/ENTITY/SYSTEM declarations to this application (trade-off: may miss encoded/obfuscated payloads and can false-positive on legitimate XML); and enforce egress filtering so the server cannot make outbound connections to arbitrary hosts, which specifically defeats the out-of-band exfiltration channel (trade-off: does not stop in-band XXE and requires known-good egress destinations). Monitor for the researcher POC and any vendor update at https://github.com/dihe123/CNVD-Jinher-OA-XXE and confirm affected versions directly with Jinher before deploying.
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External POC / Exploit Code
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