What is CVE-2021-22140?

CVE-2021-22140 is a high-severity vulnerability in Elastic App Search, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2021-05-13.

How severe is CVE-2021-22140?

High severity. CVSS v3 base score is 7.5 out of 10.

XXE in Elastic App Search

CVE-2021-22140

Elastic App Search versions after 7.11.0 and before 7.12.0 contain an XML External Entity Injection issue (XXE) in the App Search web crawler beta feature. Using this vector, an attacker whose website is being crawled by App Search could craft a malicious sitemap.xml to traverse the filesystem of the host running the instance and obtain sensitive files.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.013 (67.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Elastic App Search — versions after 7.11.0 and before 7.12.0
Elastic Elastic_app_search

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

security@elastic.co (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-22140?: CVE-2021-22140 is a high-severity vulnerability in Elastic App Search, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2021-05-13.
How severe is CVE-2021-22140?: High severity. CVSS v3 base score is 7.5 out of 10.