CVE-2023-28801

CRITICALNVD 9.69.6—

9.6

An Improper Verification of Cryptographic Signature in the SAML authentication of the Zscaler Admin UI allows a Privilege Escalation.This issue affects Admin UI: from 6.2 before 6.2r.

CVSS v3: 9.6
EG Score: 9.6(medium)
EPSS: 20.5%
KEV: Not listed

Published

August 31, 2023

Last Modified

November 21, 2024

References (2)

cve@zscalerhttps://help.zscaler.com/zia/release-upgrade-summary-2023
af854a3a-2127-422b-91ae-364da2661108https://help.zscaler.com/zia/release-upgrade-summary-2023

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-347Improper Verification of Cryptographic Signature

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 18:28 UTCEG score recompute
2026-05-24 18:28 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-28801?

CVE-2023-28801 is a critical vulnerability published on August 31, 2023. An Improper Verification of Cryptographic Signature in the SAML authentication of the Zscaler Admin UI allows a Privilege Escalation.This issue affects Admin UI: from 6.2 before 6.2r.

When was CVE-2023-28801 disclosed?

CVE-2023-28801 was first published in the National Vulnerability Database on August 31, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-28801 actively exploited?

CVE-2023-28801 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-28801?

CVE-2023-28801 has a CVSS v3 base score of 9.6 (NVD).

How do I remediate CVE-2023-28801?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-28801, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-28801

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-28801?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)