How severe is CVE-2020-15171?

CVE-2020-15171 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15171 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15171?

CVE-2020-15171 affects Xwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15171?

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

When was CVE-2020-15171 published?

CVE-2020-15171 was published on 2020-09-10 and last updated on 2026-06-17.

CVE-2020-15171

CVE-2020-15171 is a medium-severity vulnerability in Xwiki with a CVSS 3.x base score of 6.6. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 6.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Xwiki
Published: 2020-09-10
Last modified: 2026-06-17

Description

In XWiki before versions 11.10.5 or 12.2.1, any user with SCRIPT right (EDIT right before XWiki 7.4) can gain access to the application server Servlet context which contains tools allowing to instantiate arbitrary Java objects and invoke methods that may lead to arbitrary code execution. The only workaround is to give SCRIPT right only to trusted users.

Frequently asked questions

What is CVE-2020-15171?: In XWiki before versions 11.10.5 or 12.2.1, any user with SCRIPT right (EDIT right before XWiki 7.4) can gain access to the application server Servlet context which contains tools allowing to instantiate arbitrary Java objects and invoke methods that may lead to arbitrary code execution. The only workaround is to give SCRIPT right only to trusted users.
How severe is CVE-2020-15171?: CVE-2020-15171 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15171 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15171?: CVE-2020-15171 affects Xwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15171?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15171 published?: CVE-2020-15171 was published on 2020-09-10 and last updated on 2026-06-17.

References

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-7qw5-pqhc-xm4g

Affected products (1)

cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*

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