How severe is CVE-2021-38138?

CVE-2021-38138 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-38138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38138?

CVE-2021-38138 affects Onenav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38138?

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

When was CVE-2021-38138 published?

CVE-2021-38138 was published on 2021-08-05 and last updated on 2026-06-17.

CVE-2021-38138

CVE-2021-38138 is a medium-severity vulnerability in Onenav with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Onenav
Published: 2021-08-05
Last modified: 2026-06-17

Description

OneNav beta 0.9.12 allows XSS via the Add Link feature. NOTE: the vendor's position is that there intentionally is not any XSS protection at present, because the attack risk is largely limited to a compromised account; however, XSS protection is planned for a future release.

Frequently asked questions

What is CVE-2021-38138?: OneNav beta 0.9.12 allows XSS via the Add Link feature. NOTE: the vendor's position is that there intentionally is not any XSS protection at present, because the attack risk is largely limited to a compromised account; however, XSS protection is planned for a future release.
How severe is CVE-2021-38138?: CVE-2021-38138 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-38138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38138?: CVE-2021-38138 affects Onenav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38138 published?: CVE-2021-38138 was published on 2021-08-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:onenav:onenav:0.9.12:*:*:*:*:*:*:*

More vulnerabilities in Onenav

CVE-2021-38712 — High (CVSS 7.5): OneNav 0.9.12 allows Information Disclosure of the onenav.db3 contents. NOTE: the vendor's recommended solution is to…
CVE-2023-7210 — High (CVSS 7.3): A vulnerability was found in OneNav up to 0.9.33. It has been classified as critical. This affects an unknown part of…
CVE-2025-28097 — Medium (CVSS 5.5): OneNav 1.1.0 is vulnerable to Cross Site Scripting (XSS) in custom headers.
CVE-2025-28096 — Medium (CVSS 5.4): OneNav 1.1.0 is vulnerable to Server-Side Request Forgery (SSRF) in custom headers.
CVE-2022-26276 — Medium (CVSS 5.3): An issue in index.php of OneNav v0.9.14 allows attackers to perform directory traversal.

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