VulnerabilityPublished 2 Oct 2025Updated 26 Feb 2026

CVE-2025-61733: Apache Kylin · Authentication Bypass Using an Alternate Path or Channel

Affects Apache KylinSource CVE Database V5

Not known to be exploited · CVSS 7.5 High · fixed in 5.0.3 : patch Apache Kylin soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 1.3% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.0.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Apache Software Foundation Apache Kylin	Affected =4.0.0	Fixed in–

AI-suggested

To mitigate CVE-2025-61733, organizations should immediately upgrade Apache Kylin to version 5.0.3 or later, where the authentication bypass vulnerability is patched. In addition to patching, organizations should implement strict network segmentation to limit access to Apache Kylin instances, restricting them to trusted internal networks and authorized personnel only. Employing Web Application Firewalls (WAFs) with custom rules to detect and block anomalous access patterns or requests attempting to exploit alternate paths can provide an additional layer of defense. Regularly audit and monitor access logs for unusual authentication bypass attempts or unexpected access patterns. Enforce strong access control policies and consider multi-factor authentication (MFA) for administrative interfaces where possible, even though the vulnerability bypasses authentication, to reduce risk from other attack vectors. Finally, maintain an incident response plan tailored to data analytics platforms to quickly address any potential compromise.

Description

Authentication Bypass Using an Alternate Path or Channel vulnerability in Apache Kylin. This issue affects Apache Kylin: from 4.0.0 through 5.0.2. Users are recommended to upgrade to version 5.0.3, which fixes the issue.

Impact

The authentication bypass vulnerability in Apache Kylin can have significant consequences for organizations relying on this platform for big data analytics. Unauthorized access could lead to exposure of sensitive business intelligence data, including proprietary analytics, customer information, and operational metrics. This breach of confidentiality could result in competitive disadvantage, regulatory non-compliance, and reputational damage. Since the vulnerability does not affect integrity or availability directly, attackers may focus on data exfiltration or reconnaissance. The ease of exploitation—requiring no authentication or user interaction—amplifies the threat, enabling remote attackers to compromise systems at scale. Organizations in sectors such as finance, telecommunications, healthcare, and government that utilize Apache Kylin for data analytics are particularly at risk. The lack of known exploits currently provides a window for proactive mitigation, but the potential for future exploitation remains high.

CWE-288Authentication Bypass Using an Alternate Path or Channel (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
The product requires authentication, but the product has an alternate path or channel that does not require authentication.
Architecture and Design
Funnel all access through a single choke point to simplify how users can access a resource. For every access, perform a check to determine if the user has permissions to access the resource.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V1.2.3 (opens in a new tab)
V1.2.2 (opens in a new tab)
V1.2.4 (opens in a new tab)
Attack patterns
Directory Indexing (opens in a new tab)
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 04:05 UTC

WeaknessesCWE-288

Technical details

References

Community reviews

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