How severe is CVE-2023-33265?

CVE-2023-33265 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-33265 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-2023-33265?

CVE-2023-33265 primarily affects Hazelcast. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-33265?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-33265 published?

CVE-2023-33265 was published on 2023-07-18 and last updated on 2026-06-17.

CVE-2023-33265

CVE-2023-33265 is a high-severity vulnerability in Hazelcast with a CVSS 3.x base score of 8.8. 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-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Hazelcast
Published: 2023-07-18
Last modified: 2026-06-17

Description

In Hazelcast through 5.0.4, 5.1 through 5.1.6, and 5.2 through 5.2.3, executor services don't check client permissions properly, allowing authenticated users to execute tasks on members without the required permissions granted.

Frequently asked questions

What is CVE-2023-33265?: In Hazelcast through 5.0.4, 5.1 through 5.1.6, and 5.2 through 5.2.3, executor services don't check client permissions properly, allowing authenticated users to execute tasks on members without the required permissions granted.
How severe is CVE-2023-33265?: CVE-2023-33265 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-33265 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-2023-33265?: CVE-2023-33265 primarily affects Hazelcast. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-33265?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-33265 published?: CVE-2023-33265 was published on 2023-07-18 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:hazelcast:hazelcast:*:*:*:*:-:*:*:*
cpe:2.3:a:hazelcast:hazelcast:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:hazelcast:imdg:*:*:*:*:*:*:*:*

More vulnerabilities in Hazelcast

CVE-2022-0265 — Critical (CVSS 9.8): Improper Restriction of XML External Entity Reference in GitHub repository hazelcast/hazelcast in 5.1-BETA-1.
CVE-2020-26168 — Critical (CVSS 9.8): The LDAP authentication method in LdapLoginModule in Hazelcast IMDG Enterprise 4.x before 4.0.3, and Jet Enterprise 4.x…
CVE-2022-36437 — Critical (CVSS 9.1): The Connection handler in Hazelcast and Hazelcast Jet allows a remote unauthenticated attacker to access and manipulate…
CVE-2016-10750 — High (CVSS 8.1): In Hazelcast before 3.11, the cluster join procedure is vulnerable to remote code execution via Java deserialization.…
CVE-2023-45859 — High (CVSS 7.6): In Hazelcast through 4.1.10, 4.2 through 4.2.8, 5.0 through 5.0.5, 5.1 through 5.1.7, 5.2 through 5.2.4, and 5.3…
CVE-2023-45860 — Medium (CVSS 6.5): In Hazelcast Platform through 5.3.4, a security issue exists within the SQL mapping for the CSV File Source connector.…

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