How severe is CVE-2025-53351?

CVE-2025-53351 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-53351 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-53351?

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-2025-53351 have an EU (EUVD) identifier?

Yes. CVE-2025-53351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35465.

When was CVE-2025-53351 published?

CVE-2025-53351 was published on 2025-10-22 and last updated on 2026-06-17.

CVE-2025-53351

CVE-2025-53351 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. 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: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35465
Weakness: CWE-79
Published: 2025-10-22
Last modified: 2026-06-17

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Fidelo Software GmbH Fidelo Snippet thebing-snippet allows Reflected XSS.This issue affects Fidelo Snippet: from n/a through <= 1.12.

Frequently asked questions

What is CVE-2025-53351?: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Fidelo Software GmbH Fidelo Snippet thebing-snippet allows Reflected XSS.This issue affects Fidelo Snippet: from n/a through <= 1.12.
How severe is CVE-2025-53351?: CVE-2025-53351 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-53351 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-53351?: 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-2025-53351 have an EU (EUVD) identifier?: Yes. CVE-2025-53351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35465.
When was CVE-2025-53351 published?: CVE-2025-53351 was published on 2025-10-22 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/thebing-snippet/vulnerability/wordpress-fidelo-snippet-plugin-1-12-cross-site-scripting-xss-vulnerability?_s_id=cve

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