CVE-2023-38363Network attack vector

Session cookie disclosure via missing Secure attribute

Published Nov 13, 2023 · Updated Aug 30, 2024

Cookie protection failure in IBM CICS TX Advanced 10.1 allows remote attackers to obtain session cookies through cleartext HTTP. The authorization-token and session-cookie issuance path omits the Secure attribute, causing browsers to transmit those values over HTTP. A user must visit an attacker-supplied HTTP link, and the attacker must observe that traffic; exposure is limited to cookie confidentiality.

CVSS severity4.3
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cookie protection failure in IBM CICS TX Advanced 10.1 allows remote attackers to obtain session cookies through cleartext HTTP. The authorization-token and session-cookie issuance path omits the Secure attribute, causing browsers to transmit those values over HTTP. A user must visit an attacker-supplied HTTP link, and the attacker must observe that traffic; exposure is limited to cookie confidentiality.

The record

CVE
CVE-2023-38363
Published
Nov 13, 2023
Updated
Aug 30, 2024
Vendor
IBM
Product
CICS TX Advanced
Classifications
CWE-614, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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=10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · CICS TX Advancedversion=10.1

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
4.3IBMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-614Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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