CVE-2023-33189 | Incorrect Authorization with specially crafted requests

Pomerium is an identity and context-aware access proxy. With specially crafted requests, incorrect authorization decisions may be made by Pomerium. This issue has been patched in versions 0.17.4, 0.18.1, 0.19.2, 0.20.1, 0.21.4 and 0.22.2.

Published: 2023-05-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-33189 is rated Moderate Risk (59.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.92%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-33189

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.85% 0.92% +0.07%
2 2026-06-09 0.59% 0.85% +0.26%
3 2026-05-31 — 0.59% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-33189

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.8 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-33189

GitHub Security Advisory for CVE-2023-33189

GHSA-pvrc-wvj2-f59p · Severity: critical · Ecosystem: go — Pomerium vulnerable to Incorrect Authorization with specially crafted requests

Affected software / configurations for CVE-2023-33189

Vendor Product Version Raw CPE
pomerium pomerium < 0.17.4 cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:*
pomerium pomerium >= 0.19.0, < 0.19.2 cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:*
pomerium pomerium >= 0.21.0, < 0.21.4 cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:*
pomerium pomerium >= 0.22.0, < 0.22.2 cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:*
pomerium pomerium 0.18.0 cpe:2.3:a:pomerium:pomerium:0.18.0:*:*:*:*:*:*:*
pomerium pomerium 0.20.0 cpe:2.3:a:pomerium:pomerium:0.20.0:*:*:*:*:*:*:*

References for CVE-2023-33189

cvelogic Threat Intelligence