How severe is CVE-2023-49733?

CVE-2023-49733 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-49733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49733?

CVE-2023-49733 affects Apache Cocoon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-49733?

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

When was CVE-2023-49733 published?

CVE-2023-49733 was published on 2023-11-30 and last updated on 2026-06-17.

CVE-2023-49733

CVE-2023-49733 is a critical-severity vulnerability in Apache Cocoon with a CVSS 3.x base score of 9.8. 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-611.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Apache Cocoon
Published: 2023-11-30
Last modified: 2026-06-17

Description

Improper Restriction of XML External Entity Reference vulnerability in Apache Cocoon.This issue affects Apache Cocoon: from 2.2.0 before 2.3.0. Users are recommended to upgrade to version 2.3.0, which fixes the issue.

Frequently asked questions

What is CVE-2023-49733?: Improper Restriction of XML External Entity Reference vulnerability in Apache Cocoon.This issue affects Apache Cocoon: from 2.2.0 before 2.3.0. Users are recommended to upgrade to version 2.3.0, which fixes the issue.
How severe is CVE-2023-49733?: CVE-2023-49733 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-49733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49733?: CVE-2023-49733 affects Apache Cocoon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-49733?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-49733 published?: CVE-2023-49733 was published on 2023-11-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:cocoon:*:*:*:*:*:*:*:*

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