How severe is CVE-2023-6721?

CVE-2023-6721 has a CVSS 3.x base score of 8.3, 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 low.

Is CVE-2023-6721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6721?

CVE-2023-6721 affects Europeana Repox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-6721?

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-2023-6721 published?

CVE-2023-6721 was published on 2023-12-13 and last updated on 2026-06-17.

CVE-2023-6721

CVE-2023-6721 is a high-severity vulnerability in Europeana Repox with a CVSS 3.x base score of 8.3. 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: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Europeana Repox
Published: 2023-12-13
Last modified: 2026-06-17

Description

An XEE vulnerability has been found in Repox, which allows a remote attacker to interfere with the application's XML data processing in the fileupload function, resulting in interaction between the attacker and the server's file system.

Frequently asked questions

What is CVE-2023-6721?: An XEE vulnerability has been found in Repox, which allows a remote attacker to interfere with the application's XML data processing in the fileupload function, resulting in interaction between the attacker and the server's file system.
How severe is CVE-2023-6721?: CVE-2023-6721 has a CVSS 3.x base score of 8.3, 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 low.
Is CVE-2023-6721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6721?: CVE-2023-6721 affects Europeana Repox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-6721?: 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-2023-6721 published?: CVE-2023-6721 was published on 2023-12-13 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-repox

Affected products (1)

cpe:2.3:a:europeana:repox:2.3.7:*:*:*:*:*:*:*

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