How severe is CVE-2024-5521?

CVE-2024-5521 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-2024-5521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-5521?

CVE-2024-5521 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-5521?

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

Does CVE-2024-5521 have an EU (EUVD) identifier?

Yes. CVE-2024-5521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-46725.

When was CVE-2024-5521 published?

CVE-2024-5521 was published on 2024-05-30 and last updated on 2026-06-17.

CVE-2024-5521

CVE-2024-5521 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% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-46725
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 having the roles of gallery editor or VFS resource manager will have the permission to upload images in the .svg format containing JavaScript code. The code will be executed the moment another user accesses the image.

Frequently asked questions

What is CVE-2024-5521?: Two Cross-Site Scripting vulnerabilities have been discovered in Alkacon's OpenCMS affecting version 16, which could allow a user having the roles of gallery editor or VFS resource manager will have the permission to upload images in the .svg format containing JavaScript code. The code will be executed the moment another user accesses the image.
How severe is CVE-2024-5521?: CVE-2024-5521 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-2024-5521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-5521?: CVE-2024-5521 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-5521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-5521 have an EU (EUVD) identifier?: Yes. CVE-2024-5521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-46725.
When was CVE-2024-5521 published?: CVE-2024-5521 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:*:*:*:*:*:*:*

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