How severe is CVE-2022-25839?

CVE-2022-25839 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2022-25839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-25839?

CVE-2022-25839 affects Url-js Project Url-js. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-25839?

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

When was CVE-2022-25839 published?

CVE-2022-25839 was published on 2022-03-11 and last updated on 2026-06-17.

CVE-2022-25839

CVE-2022-25839 is a medium-severity vulnerability in Url-js Project Url-js with a CVSS 3.x base score of 4.3. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Url-js Project Url-js
Published: 2022-03-11
Last modified: 2026-06-17

Description

The package url-js before 2.1.0 are vulnerable to Improper Input Validation due to improper parsing, which makes it is possible for the hostname to be spoofed. http://\\\\\\\\localhost and http://localhost are the same URL. However, the hostname is not parsed as localhost, and the backslash is reflected as it is.

Frequently asked questions

What is CVE-2022-25839?: The package url-js before 2.1.0 are vulnerable to Improper Input Validation due to improper parsing, which makes it is possible for the hostname to be spoofed. http://\\\\\\\\localhost and http://localhost are the same URL. However, the hostname is not parsed as localhost, and the backslash is reflected as it is.
How severe is CVE-2022-25839?: CVE-2022-25839 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2022-25839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-25839?: CVE-2022-25839 affects Url-js Project Url-js. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-25839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-25839 published?: CVE-2022-25839 was published on 2022-03-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:url-js_project:url-js:*:*:*:*:*:node.js:*:*

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