What is CVE-2021-31381?

CVE-2021-31381 is a medium-severity vulnerability in Juniper Session And Resource Control, classified under CWE-16. CVSS score: 6.5/10. Published 2021-10-19.

How severe is CVE-2021-31381?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in Juniper Session And Resource Control

CVE-2021-31381

A configuration weakness in the JBoss Application Server (AppSvr) component of Juniper Networks SRC Series allows a remote attacker to send a specially crafted query to cause the web server to delete files which may allow the attacker to disrupt the integrity and availability of the system.

Published 2021-10-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.012 (65.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Juniper Session And Resource Control
Juniper Networks Src Series — versions unspecified, 4.13.0

Weakness classification (CWE)

References

kb.juniper.net/JSA11248 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31381?: CVE-2021-31381 is a medium-severity vulnerability in Juniper Session And Resource Control, classified under CWE-16. CVSS score: 6.5/10. Published 2021-10-19.
How severe is CVE-2021-31381?: Medium severity. CVSS v3 base score is 6.5 out of 10.