What is the CVSS score of CVE-2021-21975?

CVE-2021-21975 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 78.3%.

Is there a public PoC exploit available for CVE-2021-21975?

Yes, a public proof-of-concept exploit is available for CVE-2021-21975. Prioritise patching immediately. EPSS: 78.3%.

Vrealize Operations Manager CVE-2021-21975

HIGH

Server-Side Request Forgery (SSRF) (CWE-918)

2021-03-31 security@vmware.com

SSRF VMware Cloud Foundation Vrealize Suite Lifecycle Manager Vrealize Operations Manager

7.5

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-918 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V4 - API and Web Service URL allowlisting, SSRF prevention MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could make the server perform requests to unintended internal or external resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: HIGH severity + EPSS > 10%.

Exploited in the wild (CISA KEV) No patch listed yet 78.3% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack to steal administrative credentials. Affected products include: Vmware Cloud Foundation, Vmware Vrealize Operations Manager, Vmware Vrealize Suite Lifecycle Manager. Version information: prior to 8.4.

Know when Vrealize Operations Manager gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Mar 31, 2021 - 18:15 nvd

HIGH 7.5

DescriptionNVD

Threat Intelligence Overview

Threat Score

6.8/10

Composite threat intelligence

EPSS Score

78.3%

Top 0% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

NVD

CVE.org

CISA KEV

EPSS POC (2)

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC Yes

EPSS 78.3%

Patch available No

Active threat Yes

Deciding rule

HIGH severity + EPSS > 10%

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

High

Priority Score

201

Low Medium High Critical

KEV: +50

EPSS: +78

CVSS: +38

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Server-Side Request Forgery HIGH

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Affected Products (CPE)NVD

cpe:2.3:a:vmware:cloud_foundation:3.0:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.0.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.0.1.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.5:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.5.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.7:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.7.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.7.2:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.8:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.8.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.9:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.9.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:3.10:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:4.0:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:4.0.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vrealize_operations_manager:7.0.0:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vrealize_operations_manager:7.5.0:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vrealize_operations_manager:8.0.0:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vrealize_operations_manager:8.0.1:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vrealize_operations_manager:8.1.0:*:*:*:*:*:*:*

+ 7 more

More in Vrealize Operations Manager

View all

CVE-2021-21983 MEDIUM This Month POC

6.5 Mar 31

Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authent

CVE-2021-22027 HIGH This Week

7.5 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) contains a Server Side Request Forgery in an end point. Rated hig

CVE-2021-22026 HIGH This Week

7.5 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) contains a Server Side Request Forgery in an end point. Rated hig

CVE-2021-22025 HIGH This Week

7.5 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) contains a broken access control vulnerability leading to unauthe

CVE-2021-22024 HIGH This Week

7.5 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) contains an arbitrary log-file read vulnerability. Rated high sev

CVE-2021-22023 HIGH This Week

7.2 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) has insecure object reference vulnerability. Rated high severity

CVE-2021-22022 MEDIUM This Month

4.9 Aug 30

The vRealize Operations Manager API (8.x prior to 8.5) contains an arbitrary file read vulnerability. Rated medium sever

Same weakness CWE-918 – Server-Side Request Forgery (SSRF)

View all

CVE-2021-34473 CRITICAL POC

9.1

CVE-2021-26855 CRITICAL POC

9.1

CVE-2021-21985 CRITICAL POC

9.8

CVE-2022-41040 HIGH POC

8.8

CVE-2024-21893 HIGH POC

8.2

CVE-2021-40438 CRITICAL POC

9.0

CVE-2021-22054 HIGH POC

7.5

CVE-2023-48022 CRITICAL POC

9.8

Same technique SSRF

View all

CVE-2016-3718 MEDIUM POC

5.5

CVE-2021-22175 CRITICAL POC

9.8

References

Advisories & patches

ADVISORY https://vuldb.com/vuln/172053 ADVISORY https://www.vmware.com/security/advisories/VMSA-2021-0004.html REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21975

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back