DoubleQlik / HTTP Tunneling RCE in Qlik Sense Enterprise for Windows
CVE-2023-48365 (Qlik advisory QB-21683), also referred to as DoubleQlik, is a critical unauthenticated remote code execution vulnerability in Qlik Sense Enterprise for Windows. It affects versions before August 2023 Patch 2 and corresponding earlier supported patch levels on other release branches. The flaw is caused by improper or incomplete validation of HTTP headers, allowing a remote attacker to tunnel crafted HTTP requests through the front-end service to the backend server hosting the Qlik repository application. Because the issue is an incomplete fix for CVE-2023-41265, an attacker can abuse header handling to reach backend functionality that should not be exposed to unauthenticated users, resulting in privilege elevation and arbitrary code execution in the backend context.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
10 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.
The version that knows your environment.
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.