CVE-2024-55603Public exploitNetwork attack vector

Unauthorized access via expired session reuse

Published Dec 18, 2024 · Updated Dec 20, 2024

Insufficient session expiration in Kanboard before 1.2.43 allows remote attackers to regain access with an expired session identifier. The custom session handler's read method queries the sessions table by identifier without requiring expire_at to be later than the current time, while probabilistic garbage collection leaves stale rows available. Possession of a previously valid session identifier is required, and reuse preserves that session's access to project data and actions.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in Kanboard before 1.2.43 allows remote attackers to regain access with an expired session identifier. The custom session handler's read method queries the sessions table by identifier without requiring expire_at to be later than the current time, while probabilistic garbage collection leaves stale rows available. Possession of a previously valid session identifier is required, and reuse preserves that session's access to project data and actions.

The record

CVE
CVE-2024-55603
Published
Dec 18, 2024
Updated
Dec 20, 2024
Vendor
Kanboard
Product
Kanboard
Classifications
CWE-613
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.2.43

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kanboard · Kanboardversion=< 1.2.43

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-613Insufficient Session Expiration

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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