What is CVE-2023-30575?

CVE-2023-30575 is a medium-severity vulnerability in Apache Guacamole, classified under Incorrect Calculation of Buffer Size. CVSS score: 6.5/10. Published 2023-06-07.

How severe is CVE-2023-30575?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apache Guacamole

CVE-2023-30575

Apache Guacamole 1.5.1 and older may incorrectly calculate the lengths of instruction elements sent during the Guacamole protocol handshake, potentially allowing an attacker to inject Guacamole instructions during the handshake through specially-crafted data.

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Apache Guacamole
Apache Software Foundation Guacamole — versions 0

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

References

lists.apache.org/thread/tn63n2lon0h5p45oft834t1dqvvxownv (vendor-advisory, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-30575?: CVE-2023-30575 is a medium-severity vulnerability in Apache Guacamole, classified under Incorrect Calculation of Buffer Size. CVSS score: 6.5/10. Published 2023-06-07.
How severe is CVE-2023-30575?: Medium severity. CVSS v3 base score is 6.5 out of 10.