How severe is CVE-2023-36339?

CVE-2023-36339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-36339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36339?

CVE-2023-36339 affects Webboss Webboss.io Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36339?

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-2023-36339 published?

CVE-2023-36339 was published on 2023-07-21 and last updated on 2026-06-17.

CVE-2023-36339

CVE-2023-36339 is a high-severity vulnerability in Webboss Webboss.io Cms with a CVSS 3.x base score of 7.5. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Webboss Webboss.io Cms
Published: 2023-07-21
Last modified: 2026-06-17

Description

An access control issue in WebBoss.io CMS v3.7.0.1 allows attackers to access the Website Backup Tool via a crafted GET request.

Frequently asked questions

What is CVE-2023-36339?: An access control issue in WebBoss.io CMS v3.7.0.1 allows attackers to access the Website Backup Tool via a crafted GET request.
How severe is CVE-2023-36339?: CVE-2023-36339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-36339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36339?: CVE-2023-36339 affects Webboss Webboss.io Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36339?: 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-2023-36339 published?: CVE-2023-36339 was published on 2023-07-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webboss:webboss.io_cms:*:*:*:*:*:*:*:*

More vulnerabilities in Webboss Webboss.io Cms

CVE-2023-37742 — Medium (CVSS 6.1): WebBoss.io CMS before v3.7.0.1 was discovered to contain a reflected cross-site scripting (XSS) vulnerability.
CVE-2023-39097 — Medium (CVSS 5.4): WebBoss.io CMS v3.7.0.1 contains a stored cross-site scripting (XSS) vulnerability.
CVE-2023-39096 — Medium (CVSS 5.4): WebBoss.io CMS v3.7.0.1 contains a stored Cross-Site Scripting (XSS) vulnerability due to lack of input validation and…

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Other CWE-863 (Incorrect Authorization) vulnerabilities

CVE-2026-48286 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9396 and earlier are affected by an Incorrect Authorization…
CVE-2026-48303 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization…
CVE-2026-44330 — Critical (CVSS 10.0): free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the…
CVE-2026-46595 — Critical (CVSS 10.0): Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of…
CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
CVE-2026-32213 — Critical (CVSS 10.0): Improper authorization in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.

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