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CVE-2021-31381

27
FAUCET Score

CVE-2021-31381 is a critical configuration weakness in the JBoss Application Server component of Juniper Networks SRC Series. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted query, leading to arbitrary file deletion on the server. This can severely impact system integrity and availability, as reflected by its CVSS score of 9.1 (Critical). Despite its high severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.12.0r5CPE matchmatch criteria
cpe:2.3:a:juniper:session_and_resource_control:*:*:*:*:*:*:*:*
>= 4.13.0r1, < 4.13.0r3CPE matchmatch criteria
cpe:2.3:a:juniper:session_and_resource_control:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 48th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

juniperpatch availablevia nvd_reference
View patch

References

kb.juniper.net / JSA11248
PatchVendor Advisory