How severe is CVE-2025-56200?

CVE-2025-56200 has a CVSS 3.x base score of 6.1, rated medium 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 none.

Is CVE-2025-56200 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56200?

CVE-2025-56200 affects Validator Project Validator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56200?

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

Does CVE-2025-56200 have an EU (EUVD) identifier?

Yes. CVE-2025-56200 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31764.

When was CVE-2025-56200 published?

CVE-2025-56200 was published on 2025-09-30 and last updated on 2026-07-05.

CVE-2025-56200

CVE-2025-56200 is a medium-severity vulnerability in Validator Project Validator with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31764
Weakness: CWE-79
Affected product: Validator Project Validator
Published: 2025-09-30
Last modified: 2026-07-05

Description

A URL validation bypass vulnerability exists in validator.js through version 13.15.15. The isURL() function uses '://' as a delimiter to parse protocols, while browsers use ':' as the delimiter. This parsing difference allows attackers to bypass protocol and domain validation by crafting URLs leading to XSS and Open Redirect attacks.

Frequently asked questions

What is CVE-2025-56200?: A URL validation bypass vulnerability exists in validator.js through version 13.15.15. The isURL() function uses '://' as a delimiter to parse protocols, while browsers use ':' as the delimiter. This parsing difference allows attackers to bypass protocol and domain validation by crafting URLs leading to XSS and Open Redirect attacks.
How severe is CVE-2025-56200?: CVE-2025-56200 has a CVSS 3.x base score of 6.1, rated medium 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 none.
Is CVE-2025-56200 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56200?: CVE-2025-56200 affects Validator Project Validator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56200?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-56200 have an EU (EUVD) identifier?: Yes. CVE-2025-56200 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31764.
When was CVE-2025-56200 published?: CVE-2025-56200 was published on 2025-09-30 and last updated on 2026-07-05.

References

EU advisories (EUVD)

http://validatorjs.com

Affected products (1)

cpe:2.3:a:validator_project:validator:*:*:*:*:*:node.js:*:*

More vulnerabilities in Validator Project Validator

CVE-2025-12758 — High (CVSS 7.5): Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of…
CVE-2021-3765 — High (CVSS 7.5): validator.js is vulnerable to Inefficient Regular Expression Complexity

All CVEs affecting Validator Project Validator →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →