How severe is CVE-2020-10203?

CVE-2020-10203 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-10203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10203?

CVE-2020-10203 affects Sonatype Nexus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10203?

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

When was CVE-2020-10203 published?

CVE-2020-10203 was published on 2020-04-01 and last updated on 2026-06-17.

CVE-2020-10203

CVE-2020-10203 is a medium-severity vulnerability in Sonatype Nexus with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sonatype Nexus
Published: 2020-04-01
Last modified: 2026-06-17

Description

Sonatype Nexus Repository before 3.21.2 allows XSS.

Frequently asked questions

What is CVE-2020-10203?: Sonatype Nexus Repository before 3.21.2 allows XSS.
How severe is CVE-2020-10203?: CVE-2020-10203 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-10203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10203?: CVE-2020-10203 affects Sonatype Nexus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-10203 published?: CVE-2020-10203 was published on 2020-04-01 and last updated on 2026-06-17.

References

https://support.sonatype.com/hc/en-us/articles/360044361594

Affected products (1)

cpe:2.3:a:sonatype:nexus:*:*:*:*:*:*:*:*

More vulnerabilities in Sonatype Nexus

CVE-2020-11444 — High (CVSS 8.8): Sonatype Nexus Repository Manager 3.x up to and including 3.21.2 has Incorrect Access Control.
CVE-2020-10199 — High (CVSS 8.8): Sonatype Nexus Repository before 3.21.2 allows JavaEL Injection (issue 1 of 2).
CVE-2014-9389 — High (CVSS 7.5): Directory traversal vulnerability in Sonatype Nexus OSS and Pro before 2.11.1-01 allows remote attackers to read or…
CVE-2014-2034 — High (CVSS 7.5): Unspecified vulnerability in Sonatype Nexus OSS and Pro 2.4.0 through 2.7.1 allows attackers to create arbitrary user…
CVE-2014-0792 — High (CVSS 7.5): Sonatype Nexus 1.x and 2.x before 2.7.1 allows remote attackers to create arbitrary objects and execute arbitrary code…
CVE-2020-10204 — High (CVSS 7.2): Sonatype Nexus Repository before 3.21.2 allows Remote Code Execution.

All CVEs affecting Sonatype Nexus →

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