How severe is CVE-2021-25968?

CVE-2021-25968 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-25968 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25968?

CVE-2021-25968 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25968?

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

When was CVE-2021-25968 published?

CVE-2021-25968 was published on 2021-10-19 and last updated on 2026-06-17.

CVE-2021-25968

CVE-2021-25968 is a medium-severity vulnerability in Alkacon Opencms with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Alkacon Opencms
Published: 2021-10-19
Last modified: 2026-06-17

Description

In “OpenCMS”, versions 10.5.0 to 11.0.2 are affected by a stored XSS vulnerability that allows low privileged application users to store malicious scripts in the Sitemap functionality. These scripts are executed in a victim’s browser when they open the page containing the vulnerable field.

Frequently asked questions

What is CVE-2021-25968?: In “OpenCMS”, versions 10.5.0 to 11.0.2 are affected by a stored XSS vulnerability that allows low privileged application users to store malicious scripts in the Sitemap functionality. These scripts are executed in a victim’s browser when they open the page containing the vulnerable field.
How severe is CVE-2021-25968?: CVE-2021-25968 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-25968 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25968?: CVE-2021-25968 affects Alkacon Opencms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25968?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-25968 published?: CVE-2021-25968 was published on 2021-10-19 and last updated on 2026-06-17.

References

Affected products (1)

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

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CVE-2018-8811 — High (CVSS 8.8): Cross-site request forgery (CSRF) vulnerability in system/workplace/admin/accounts/user_role.jsp in OpenCMS 10.5.3…
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