What is CVE-2020-15252?

CVE-2020-15252 is a high-severity vulnerability in Xwiki, classified under Code Injection. CVSS score: 8.5/10. Published 2020-10-16.

How severe is CVE-2020-15252?

High severity. CVSS v3 base score is 8.5 out of 10.

RCE in Xwiki

CVE-2020-15252

In XWiki before version 12.5 and 11.10.6, 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. This is patched in XWiki 12.5 and XWiki 11.10.6.

Vulnerability class: RCE (Remote Code Execution)

Published 2020-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Xwiki
Xwiki Xwiki-Platform — versions >= 12.0, < 12.5, < 11.10.6

Weakness classification (CWE)

References

github.com/xwiki/xwiki-platform/security/advisories/GHSA-5hv6-mh8q-q9v8 (Third Party Advisory)
jira.xwiki.org/browse/XWIKI-17141 (Exploit, Vendor Advisory)
jira.xwiki.org/browse/XWIKI-17423 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-15252?: CVE-2020-15252 is a high-severity vulnerability in Xwiki, classified under Code Injection. CVSS score: 8.5/10. Published 2020-10-16.
How severe is CVE-2020-15252?: High severity. CVSS v3 base score is 8.5 out of 10.