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CVE-2023-41265 is an HTTP request tunneling vulnerability in Qlik Sense Enterprise for Windows caused by inconsistent request framing between its proxy and backend repository service. The proxy prioritizes Content-Length while forwarding Transfer-Encoding, allowing embedded requests to be processed independently by the backend. These tunneled requests bypass proxy header controls and can impersonate privileged internal identities trusted by backend services. Attackers can perform administrative operations and create external program tasks to execute arbitrary commands under the Qlik Sense service account. When chained with the authentication bypass CVE-2023-41266, the vulnerability enables unauthenticated remote code execution; this chain is known as ZeroQlik. Affected releases include May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Qlik Sense vulnerability allowing attackers to elevate privileges to a service account and execute requests with its permissions. Combined with CVE-2023-41266, it forms the ZeroQlik exploit chain used for initial access and arbitrary command execution in the reported Cactus ransomware attacks. The investigators could not distinguish this chain from DoubleQlik using Qlik Sense logs.
A vulnerability in Qlik Sense exploited by Cactus ransomware for initial access.
A Qlik Sense Enterprise vulnerability that can enable an unauthenticated attacker to take over the system hosting Qlik Sense. It has reportedly been exploited, alone or in combination with the other listed flaws, to deploy ransomware.
A Qlik Sense vulnerability known as ZeroQlik that is discussed as part of the exploit chain used by the Cactus ransomware group.
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.