CVE-2021-31380Network attack vector

Unauthenticated information disclosure via crafted AppSvr query

Published Oct 19, 2021 · Updated Sep 16, 2024

Information disclosure in the AppSvr component of Juniper Networks SRC Series allows remote attackers to read sensitive data via a crafted query. A JBoss Application Server configuration returns sensitive information in the HTTP response when it processes the query; Juniper has not disclosed the specific misconfiguration or query parameter. No authentication or user interaction is required, and the documented impact is limited to disclosure without data modification or service interruption.

CVSS severity5.3
Medium
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the AppSvr component of Juniper Networks SRC Series allows remote attackers to read sensitive data via a crafted query. A JBoss Application Server configuration returns sensitive information in the HTTP response when it processes the query; Juniper has not disclosed the specific misconfiguration or query parameter. No authentication or user interaction is required, and the documented impact is limited to disclosure without data modification or service interruption.

The record

CVE
CVE-2021-31380
Published
Oct 19, 2021
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
SRC Series Session and Resource Control Software
Classifications
CWE-16, CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.13.0 <4.13.0R3
  2. Affected versionversion=unspecified <4.12.0R5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · SRC Series Session and Resource Control Softwareversion=4.13.0 <4.13.0R3; version=unspecified <4.12.0R5

Published CVSS scores

5.3Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-16Configuration
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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