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CVE-2023-38203 is an untrusted-data deserialization vulnerability affecting Adobe ColdFusion 2018 Update 17 and earlier, 2021 Update 7 and earlier, and 2023 Update 1 and earlier. ColdFusion's Web Distributed Data eXchange (WDDX) deserialization controls failed to block a Java deserialization gadget omitted from the denylist introduced for CVE-2023-29300. Crafted requests can exploit this omission to execute arbitrary code without user interaction. Observed attacks apparently chained the vulnerability with the CVE-2023-29298 access control bypass to reach a ColdFusion administrative component.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously reported ColdFusion deserialization of untrusted data vulnerability mentioned only in related content.
A critical ColdFusion deserialization of untrusted data vulnerability that could lead to arbitrary code execution.
An Adobe ColdFusion vulnerability cited as one of the known N-days exploited by Storm-0501/Embargo for initial access.
A known vulnerability affecting Adobe ColdFusion associated with Storm-0501's initial-access activity preceding Embargo ransomware deployment.
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.