VulnerabilityPublished 4 Feb 2026

CVE-2024-43181: IBM Concert · Insufficient Session Expiration

Affects IBM ConcertSource CVE Database V5

Not known to be exploited · CVSS 6.3 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

6.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
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
IBMConcert	Affected >=1.0.0 <=2.1.0	Fixed in–

CPE configurations (2)

cpe:2.3:a:ibm:concert:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:concert:2.1.0:*:*:*:*:*:*:*

AI-suggested

European organizations should implement the following specific mitigations: 1) Monitor IBM Concert sessions for anomalies such as repeated session reuse or concurrent sessions from the same user. 2) Enforce strict session timeout policies and consider reducing session lifetimes to limit exposure. 3) Implement multi-factor authentication (MFA) to reduce the risk of credential compromise. 4) Restrict access to IBM Concert to trusted networks or VPNs to reduce external attack vectors. 5) Educate users about proper logout procedures and the risks of session reuse. 6) Regularly audit user sessions and logs for signs of impersonation or unauthorized access. 7) Engage with IBM support to obtain patches or updates addressing this vulnerability as soon as they become available. 8) Consider deploying web application firewalls (WAFs) or session management proxies that can enforce session invalidation on logout as a compensating control. 9) Review and tighten privilege assignments within IBM Concert to minimize potential damage from impersonation. 10) Prepare incident response plans specific to session hijacking scenarios.

Description

CVE-2024-43181 is a medium severity vulnerability in IBM Concert versions 1.0.0 through 2.1.0 where sessions are not invalidated upon user logout. This insufficient session expiration (CWE-613) flaw allows an authenticated user to potentially impersonate another user by reusing a session token after logout. The vulnerability requires prior authentication but no user interaction beyond logout. Exploitation could lead to limited confidentiality, integrity, and availability impacts. No known exploits are currently reported in the wild. European organizations using IBM Concert should prioritize patching or implementing compensating controls to prevent session reuse.

Impact

For European organizations, the vulnerability poses a risk of session hijacking and user impersonation within IBM Concert environments. This could lead to unauthorized access to sensitive collaboration data, workflow manipulation, and potential disruption of business processes. Confidentiality is impacted as attackers may access data belonging to other users; integrity is affected through unauthorized actions performed under another user's identity; availability impact is possible if attackers disrupt sessions or workflows. Organizations in sectors such as finance, government, healthcare, and critical infrastructure using IBM Concert for internal collaboration could face operational risks and compliance issues, especially under GDPR requirements for data protection. The requirement for prior authentication limits the attack surface but insider threats or compromised credentials could facilitate exploitation. The lack of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits over time.

CWE-613Insufficient Session Expiration (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
Implementation
Set sessions/credentials expiration date.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V2.8.1 (opens in a new tab)
V2.8.6 (opens in a new tab)
V3.6.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

ibm.com/support/pages/node/7257006 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

CPE configurations (2)

Description

AI analysisMachine-generated, updated 12 Feb 2026, 07:38 UTC

WeaknessesCWE-613

Technical details

References

Community reviews

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