How severe is CVE-2025-8838?

CVE-2025-8838 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-8838 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8838?

CVE-2025-8838 affects Winterchens My-site. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8838?

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.

Does CVE-2025-8838 have an EU (EUVD) identifier?

Yes. CVE-2025-8838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24136.

When was CVE-2025-8838 published?

CVE-2025-8838 was published on 2025-08-11 and last updated on 2026-06-17.

CVE-2025-8838

CVE-2025-8838 is a high-severity vulnerability in Winterchens My-site with a CVSS 3.x base score of 7.3. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24136
Weakness: CWE-287
Affected product: Winterchens My-site
Published: 2025-08-11
Last modified: 2026-06-17

Description

A vulnerability has been found in WinterChenS my-site up to 1f7525f15934d9d6a278de967f6ec9f1757738d8. This vulnerability affects the function preHandle of the file /admin/ of the component Backend Interface. The manipulation of the argument uri leads to improper authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The code maintainer responded to the issue that "[he] tried it, and using this link automatically redirects to the login page."

Frequently asked questions

What is CVE-2025-8838?: A vulnerability has been found in WinterChenS my-site up to 1f7525f15934d9d6a278de967f6ec9f1757738d8. This vulnerability affects the function preHandle of the file /admin/ of the component Backend Interface. The manipulation of the argument uri leads to improper authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The code maintainer responded to the issue that "[he] tried it, and using this link automatically redirects to the login page."
How severe is CVE-2025-8838?: CVE-2025-8838 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-8838 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8838?: CVE-2025-8838 affects Winterchens My-site. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8838?: 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.
Does CVE-2025-8838 have an EU (EUVD) identifier?: Yes. CVE-2025-8838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24136.
When was CVE-2025-8838 published?: CVE-2025-8838 was published on 2025-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:winterchens:my-site:2025-06-11:*:*:*:*:*:*:*

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