Qlik Sense - HTTP Request Tunneling (CVE-2023-41265)
206Exploiting 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.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2023-41265 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2023-41265. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.
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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