CVE-2021-44140: Arbitrary file deletion on logout

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-24 · updated 2026-06-17
Weakness: CWE-276

Description

Remote attackers may delete arbitrary files in a system hosting a JSPWiki instance, versions up to 2.11.0.M8, by using a carefuly crafted http request on logout, given that those files are reachable to the user running the JSPWiki instance. Apache JSPWiki users should upgrade to 2.11.0 or later.

Affected products

Apache Software Foundation Apache JSPWiki: before 2.11.0 — fixed in 2.11.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache JSPWiki 2.11.0. Check the vendor advisory for mitigations.

References

https://jspwiki-wiki.apache.org/Wiki.jsp?page=CVE-2021-44140
https://lists.apache.org/thread/5qglpjdhvobppx7j550lf1sk28f6011t
https://jspwiki-wiki.apache.org/Wiki.jsp?page=CVE-2021-44140
https://lists.apache.org/thread/5qglpjdhvobppx7j550lf1sk28f6011t

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