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Opencti CVE-2025-24887

MEDIUM
Improper Access Control (CWE-284)
2025-04-30 security-advisories@github.com
6.3
CVSS 3.1 · GitHub Advisory
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 6.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.22%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

OpenCTI is an open-source cyber threat intelligence platform. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

pypi pycti fix: 6.4.11

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-284. OpenCTI is an open-source cyber threat intelligence platform. In versions starting from 6.4.8 to before 6.4.10, the allow/deny lists can be bypassed, allowing a user to change attributes that are intended to be unmodifiable by the user. It is possible to toggle the external flag on/off and change the own token value for a user. It is also possible to edit attributes that are not in the allow list, such as otp_qr and otp_activated. If external users exist in the OpenCTI setup and the information about these users identities is sensitive, the above vulnerabilities can be used to enumerate existing user accounts as a standard low privileged user. This issue has been patched in version 6.4.10. Affected products include: Citeum Opencti. Version information: before 6.4.10.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 6.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

DescriptionGitHub Advisory

OpenCTI is an open-source cyber threat intelligence platform. In versions starting from 6.4.8 to before 6.4.10, the allow/deny lists can be bypassed, allowing a user to change attributes that are intended to be unmodifiable by the user. It is possible to toggle the external flag on/off and change the own token value for a user. It is also possible to edit attributes that are not in the allow list, such as otp_qr and otp_activated. If external users exist in the OpenCTI setup and the information about these users identities is sensitive, the above vulnerabilities can be used to enumerate existing user accounts as a standard low privileged user. This issue has been patched in version 6.4.10.

Executive ViewAI

Why It Matters

Organizations using versions starting from 6.4.8 to should be aware of moderate risk from CVE-2025-24887, a improper access control vulnerability rated CVSS 6.3. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.2%
Top 55% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*
CVE-2026-27960 CRITICAL POC
9.8 May 05

Unauthenticated attackers can escalate privileges in OpenCTI 6.6.0-6.9.12 by impersonating any user account, including t

CVE-2026-39980 CRITICAL POC
9.1 Apr 09

Server-Side Template Injection in OpenCTI notifier templates allows privileged administrators with 'Manage customization

CVE-2020-37041 HIGH POC
7.5 Jan 30

OpenCTI 3.3.1 is vulnerable to a directory traversal attack via the static/css endpoint. An unauthenticated attacker can

CVE-2020-37044 MEDIUM POC
5.4 Jan 30

OpenCTI 3.3.1 is vulnerable to a reflected cross-site scripting (XSS) attack via the /graphql endpoint. An attacker can

CVE-2025-24977 CRITICAL
9.1 May 05

OpenCTI is an open cyber threat intelligence (CTI) platform. Rated critical severity (CVSS 9.1), this vulnerability is r

CVE-2025-61781 CRITICAL
9.1 Jan 05

Authenticated attackers can delete arbitrary workspaces in OpenCTI versions prior to 6.8.1 due to missing ownership chec

CVE-2024-45404 HIGH
8.1 Dec 12

OpenCTI is an open-source cyber threat intelligence platform. Rated high severity (CVSS 8.1), this vulnerability is remo

CVE-2024-26139 HIGH
8.1 May 23

OpenCTI is an open source platform allowing organizations to manage their cyber threat intelligence knowledge and observ

CVE-2022-30290 HIGH
7.5 Jul 05

In OpenCTI through 5.2.4, a broken access control vulnerability has been identified in the profile endpoint. Rated high

CVE-2026-44730 HIGH
7.2 May 26

Privilege escalation in OpenCTI prior to 6.9.7 allows an organization admin to gain elevated platform-wide privileges by

CVE-2026-35210 HIGH
7.1 Jul 08

Authorization bypass in OpenCTI prior to version 7.260326.0 lets any authenticated user holding the KNOWLEDGE_KNUPDATE p

CVE-2026-35211 MEDIUM
6.5 Jul 08

Elasticsearch Painless script injection via OpenCTI's GraphQL API allows any authenticated user holding the KNOWLEDGE ca

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