How severe is CVE-2024-5520?

CVE-2024-5520 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-5520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-5520?

CVE-2024-5520 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-5520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-5520 have an EU (EUVD) identifier?

Yes. CVE-2024-5520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1803.

When was CVE-2024-5520 published?

CVE-2024-5520 was published on 2024-05-30 and last updated on 2026-06-17.

CVE-2024-5520

CVE-2024-5520 is a medium-severity vulnerability in Alkacon Opencms with a CVSS 3.x base score of 6.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1803
Weakness: CWE-79
Affected product: Alkacon Opencms
Published: 2024-05-30
Last modified: 2026-06-17

Description

Two Cross-Site Scripting vulnerabilities have been discovered in Alkacon's OpenCMS affecting version 16, which could allow a user with sufficient privileges to create and modify web pages through the admin panel, can execute malicious JavaScript code, after inserting code in the “title” field.

Frequently asked questions

What is CVE-2024-5520?: Two Cross-Site Scripting vulnerabilities have been discovered in Alkacon's OpenCMS affecting version 16, which could allow a user with sufficient privileges to create and modify web pages through the admin panel, can execute malicious JavaScript code, after inserting code in the “title” field.
How severe is CVE-2024-5520?: CVE-2024-5520 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-5520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-5520?: CVE-2024-5520 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-5520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-5520 have an EU (EUVD) identifier?: Yes. CVE-2024-5520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1803.
When was CVE-2024-5520 published?: CVE-2024-5520 was published on 2024-05-30 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-stored-alkacon-opencms

Affected products (1)

cpe:2.3:a:alkacon:opencms:16.0.0:*:*:*:*:*:*:*

More vulnerabilities in Alkacon Opencms

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