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CVE-2023-54398 is an unsafe Java deserialization vulnerability in Yonyou U8 Cloud. A servlet action processes raw HTTP POST request-body data with ObjectInputStream.readObject() without validation or deserialization filtering. An unauthenticated remote attacker can submit a crafted serialized Java object graph that triggers arbitrary operating-system command execution.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unauthenticated Java deserialization vulnerability in Yonyou U8 Cloud's FileManageServlet. Raw POST-body data is passed to ObjectInputStream.readObject() without filtering, allowing remote unauthenticated attackers to execute arbitrary operating-system commands.
An unauthenticated remote code execution vulnerability in Yonyou U8 Cloud's FileManageServlet. The doAction method deserializes raw POST-body data using ObjectInputStream.readObject() without filtering, enabling an unauthenticated attacker to execute arbitrary operating-system commands using a crafted serialized payload.
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.