How severe is CVE-2025-63416?

CVE-2025-63416 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2025-63416 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63416?

CVE-2025-63416 affects Selfbest. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63416?

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.

Does CVE-2025-63416 have an EU (EUVD) identifier?

Yes. CVE-2025-63416 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37926.

When was CVE-2025-63416 published?

CVE-2025-63416 was published on 2025-11-05 and last updated on 2026-06-17.

CVE-2025-63416

CVE-2025-63416 is a critical-severity vulnerability in Selfbest with a CVSS 3.x base score of 9.1. 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: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37926
Weakness: CWE-79
Affected product: Selfbest
Published: 2025-11-05
Last modified: 2026-06-17

Description

** exclusively-hosted-service ** A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 allows authenticated low-privileged attackers to execute arbitrary JavaScript in the context of other users' sessions. This can be exploited to access administrative data and functions, leading to privilege escalation and full compromise of sensitive user data, as demonstrated by the ability to fetch and exfiltrate the contents of the /admin/users endpoint.

Frequently asked questions

What is CVE-2025-63416?: ** exclusively-hosted-service ** A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 allows authenticated low-privileged attackers to execute arbitrary JavaScript in the context of other users' sessions. This can be exploited to access administrative data and functions, leading to privilege escalation and full compromise of sensitive user data, as demonstrated by the ability to fetch and exfiltrate the contents of the /admin/users endpoint.
How severe is CVE-2025-63416?: CVE-2025-63416 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2025-63416 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63416?: CVE-2025-63416 affects Selfbest. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63416?: 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.
Does CVE-2025-63416 have an EU (EUVD) identifier?: Yes. CVE-2025-63416 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37926.
When was CVE-2025-63416 published?: CVE-2025-63416 was published on 2025-11-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:selfbest:selfbest:2023.3:*:*:*:*:*:*:*

More vulnerabilities in Selfbest

CVE-2025-63417 — High (CVSS 7.2): A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 allows…
CVE-2025-63418 — Medium (CVSS 6.1): A DOM-based Cross-Site Scripting (XSS) vulnerability in the SelfBest platform 2023.3 allows attackers to execute…

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