How severe is CVE-2023-40184?

CVE-2023-40184 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2023-40184 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40184?

CVE-2023-40184 affects Neutrinolabs Xrdp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40184?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-40184 published?

CVE-2023-40184 was published on 2023-08-30 and last updated on 2026-06-17.

CVE-2023-40184

CVE-2023-40184 is a low-severity vulnerability in Neutrinolabs Xrdp with a CVSS 3.x base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-755.

Key facts

Severity: Low (CVSS 3.x base score 2.6)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Neutrinolabs Xrdp
Published: 2023-08-30
Last modified: 2026-06-17

Description

xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.

Frequently asked questions

What is CVE-2023-40184?: xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.
How severe is CVE-2023-40184?: CVE-2023-40184 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2023-40184 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40184?: CVE-2023-40184 affects Neutrinolabs Xrdp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40184?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40184 published?: CVE-2023-40184 was published on 2023-08-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*

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