What is CVE-2021-44140?

CVE-2021-44140 is a critical-severity vulnerability in Apache Jspwiki, classified under Incorrect Default Permissions. CVSS score: 9.1/10. Published 2021-11-24.

How severe is CVE-2021-44140?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2021-44140 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apache Jspwiki

CVE-2021-44140

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.

Published 2021-11-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.064 (93.6th percentile), scored 2026-10-22.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000

Affected products

Apache Jspwiki
Apache Software Foundation Jspwiki — versions Apache JSPWiki

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

References

jspwiki-wiki.apache.org/Wiki.jsp (Vendor Advisory)
lists.apache.org/thread/5qglpjdhvobppx7j550lf1sk28f6011t (Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2021-44140?: CVE-2021-44140 is a critical-severity vulnerability in Apache Jspwiki, classified under Incorrect Default Permissions. CVSS score: 9.1/10. Published 2021-11-24.
How severe is CVE-2021-44140?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2021-44140 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.