How severe is CVE-2023-28963?

CVE-2023-28963 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-28963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28963?

CVE-2023-28963 primarily affects Juniper Junos. In total, 138 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-28963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-28963 published?

CVE-2023-28963 was published on 2023-04-17 and last updated on 2026-06-17.

CVE-2023-28963

CVE-2023-28963 is a medium-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Juniper Junos
Published: 2023-04-17
Last modified: 2026-06-17

Description

An Improper Authentication vulnerability in cert-mgmt.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to read arbitrary files from temporary folders on the device. This issue affects Juniper Networks Junos OS: All versions prior to 19.1R3-S10; 19.2 versions prior to 19.2R3-S7; 19.3 versions prior to 19.3R3-S8; 19.4 versions prior to 19.4R3-S11; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R1-S2, 22.3R2.

Frequently asked questions

What is CVE-2023-28963?: An Improper Authentication vulnerability in cert-mgmt.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to read arbitrary files from temporary folders on the device. This issue affects Juniper Networks Junos OS: All versions prior to 19.1R3-S10; 19.2 versions prior to 19.2R3-S7; 19.3 versions prior to 19.3R3-S8; 19.4 versions prior to 19.4R3-S11; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R1-S2, 22.3R2.
How severe is CVE-2023-28963?: CVE-2023-28963 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-28963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28963?: CVE-2023-28963 primarily affects Juniper Junos. In total, 138 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-28963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-28963 published?: CVE-2023-28963 was published on 2023-04-17 and last updated on 2026-06-17.

References

https://supportportal.juniper.net/JSA70587

Affected products (138)

cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s9:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s4:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →