Is CVE-2021-23135 in the CISA KEV catalog?

No. CVE-2021-23135 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23135?

CVE-2021-23135 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2021-23135?

CVE-2021-23135 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23135?

Upgrade argo cd to 1.8.7 or later.

CVE & CISA-KEV Catalog

CVE-2021-23135

MEDIUM

5.9

CVSS v3

NVD

Description

Exposure of System Data to an Unauthorized Control Sphere vulnerability in web UI of Argo CD allows attacker to cause leaked secret data into web UI error messages and logs. This issue affects Argo CD 1.8 versions prior to 1.8.7; 1.7 versions prior to 1.7.14.

CWE-497 CWE-209

How to fix

Remediation Available

argo cdNVD

Affected:>= 1.8.0, < 1.8.7Fixed in:1.8.7CVE-2021-23135derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-497 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-31955	Medium	5.5	81%	KEV	Fix
CVE-2026-7864	Medium	6.9	17%	-	-
CVE-2025-44823	Critical	9.9	16%	-	Fix
CVE-2025-55131	High	7.1	3.5%	-	Fix
CVE-2026-34413	High	8.6	2.8%	-	-
CVE-2024-13999	Critical	9.8	1.8%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.