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CVE-2023-30575

Apache Guacamole: Incorrect calculation of Guacamole protocol element lengths

HIGH
7.5
CVSS Score
Published: June 7, 2023 at 08:06 AM UTC
Updated: June 17, 2026 at 05:55 AM UTC
1 product affected across 1 vendorGuacamole

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Guacamole· Apache
95%
v ≤ 1.5.1
Affected range stops below 1.5.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryMailing ListThird Party Advisory
Source: [email protected]
https://lists.apache.org/thread/tn63n2lon0h5p45oft834t1dqvvxownv

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-131

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