What is the CVSS score of CVE-2021-38138?

CVE-2021-38138 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 1.5%.

Is there a public PoC exploit available for CVE-2021-38138?

Yes, a public proof-of-concept exploit is available for CVE-2021-38138. Prioritise patching immediately. EPSS: 1.5%.

Onenav CVE-2021-38138

MEDIUM

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

2021-08-05 cve@mitre.org

XSS Onenav

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Aug 05, 2021 - 16:15 nvd

MEDIUM 5.4

DescriptionNVD

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.

AnalysisAI

OneNav beta 0.9.12 allows XSS via the Add Link feature. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Onenav.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.