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CVE-2023-48365, also known as DoubleQlik and tracked by Qlik as QB-21683, is an unauthenticated remote code execution vulnerability in Qlik Sense Enterprise for Windows. Improper validation of HTTP headers permits an external attacker to tunnel HTTP requests through the exposed Qlik Sense service to the backend repository application. This bypasses the intended request-routing and privilege boundary, enabling the attacker to execute requests and ultimately arbitrary code in the backend server’s security context. The issue resulted from an incomplete fix for CVE-2023-41265.
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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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Qlik Sense Enterprise involving HTTP tunneling.
A Qlik vulnerability that CISA KEV’s knownRansomwareCampaignUse field silently flipped to Known during 2025 (evidence of ransomware campaign use).
A high-severity HTTP tunneling vulnerability in Qlik Sense Enterprise for Windows, allowing privilege escalation and remote exploitation.
A vulnerability in Qlik Sense exploited by Cactus ransomware for initial access.
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.