Threats / Qlik / CVE-2023-41266
CVE-2023-41266
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Qlik Sense vulnerability
Qlik Sense contains a path traversal vulnerability allowing unauthenticated remote attackers to create anonymous sessions and access unauthorized endpoints.
Verdict
Today item, not a backlog item.
A critical unauthenticated path traversal flaw in Qlik Sense enables attackers to bypass authentication, establish anonymous sessions, and pivot to restricted functionality. Active exploitation and ransomware deployment confirm severe real-world risk.
CISA KEV Yes · 2023-12-073Ransomware use Flagged3EPSS 0.84966 (verify live)4Exploit Weaponized · public PoC5
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
8 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-07), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.84966 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Qlik, Sense. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-20 Improper Input Validation.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft malicious HTTP requests exploiting path traversal to bypass authentication controls.
Business
Authentication mechanisms fail to protect sensitive endpoints from unauthenticated access.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I establish an anonymous session without credentials, gaining a foothold in the application.
Business
Session management allows unauthorized actors to interact with the platform as valid users.
3
Lateral reach — past segmentation narrative 3
Attacker
I enumerate and access unauthorized endpoints to extract data or identify further attack vectors.
Business
Sensitive business intelligence, configurations, and user data become accessible to external threat actors.
4
Data at risk — exfiltration narrative 4
Attacker
I leverage endpoint access to deploy ransomware or establish persistence for follow-on attacks.
Business
Systems become compromised, leading to data encryption, operational disruption, and extortion demands.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05