Qlik Sense - HTTP Request Tunneling (CVE-2023-41265)
193Exploiting IPs reported
An HTTP Request Tunneling vulnerability found in Qlik Sense Enterprise for Windows for versions 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 allows a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.
CrowdSec analysis
CVE-2023-41265 is a critical vulnerability in Qlik Sense Enterprise for Windows that allows remote attackers to elevate privileges by tunneling HTTP requests through crafted requests, which are then processed by the backend server.
CrowdSec has been tracking this vulnerability and its exploits since 10th of March 2025.
Data from the CrowdSec community indicates that exploitation of CVE-2023-41265 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. CrowdSec network telemetry also shows that exploitation of CVE-2023-41265 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.
Observed exploitation attempts involve requests to URLs containing /resources/qmc/fonts/../.
Exploitation
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Common Weakness Enumeration (CWE)
Protection
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Blocklist
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