CVE-2023-28963Network attack vector

Unauthenticated temporary-file disclosure via cert-mgmt.php

Published Apr 17, 2023 · Updated Feb 6, 2025

Improper authentication in J-Web on affected Junos OS releases allows remote attackers to read arbitrary files from device temporary folders. The cert-mgmt.php endpoint processes attacker-controlled file requests without enforcing authentication before returning temporary-file contents. J-Web must be enabled and network-reachable; exposure is limited to files in temporary folders, with no reported write or execution.

CVSS severity5.3
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in J-Web on affected Junos OS releases allows remote attackers to read arbitrary files from device temporary folders. The cert-mgmt.php endpoint processes attacker-controlled file requests without enforcing authentication before returning temporary-file contents. J-Web must be enabled and network-reachable; exposure is limited to files in temporary folders, with no reported write or execution.

The record

CVE
CVE-2023-28963
Published
Apr 17, 2023
Updated
Feb 6, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-287, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record 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=19.2 <19.2R3-S7
  2. Affected versionversion=19.3 <19.3R3-S8
  3. Affected versionversion=19.4 <19.4R3-S11
  4. Affected versionversion=20.1R1 <20.1*
  5. Affected versionversion=20.2 <20.2R3-S7
  6. Affected versionversion=20.3R1 <20.3*
  7. Affected versionversion=20.4 <20.4R3-S6
  8. Affected versionversion=21.1 <21.1R3-S5
  9. Affected versionversion=21.2 <21.2R3-S4
  10. Affected versionversion=21.3 <21.3R3-S3
  11. Affected versionversion=21.4 <21.4R3-S3
  12. Affected versionversion=22.1 <22.1R3-S1
  13. Affected versionversion=22.2 <22.2R2-S1, 22.2R3
  14. Affected versionversion=22.3 <22.3R1-S2, 22.3R2
  15. Affected versionversion=unspecified <19.1R3-S10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=19.2 <19.2R3-S7; version=19.3 <19.3R3-S8; version=19.4 <19.4R3-S11; version=20.1R1 <20.1*; version=20.2 <20.2R3-S7; version=20.3R1 <20.3*; version=20.4 <20.4R3-S6; version=21.1 <21.1R3-S5; version=21.2 <21.2R3-S4; version=21.3 <21.3R3-S3; version=21.4 <21.4R3-S3; version=22.1 <22.1R3-S1; version=22.2 <22.2R2-S1, 22.2R3; version=22.3 <22.3R1-S2, 22.3R2; version=unspecified <19.1R3-S10

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application
T1005Data from Local System

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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