CVE-2021-21479 Exploited in the Wild — SCIMono

Vendor	Product	Version	Status
SAP SE	SCIMono	< 0.0.19	Affected

Known Exploited Vulnerability Sources

Catalogues that list this CVE as a known exploited vulnerability.

Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.

Source	Added
The Shadowserver First	2025-07-27 00:00 UTC

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21479.yaml	Apr 25, 2025

Virtual Patch

Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.

Not available

KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.

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CVSS Scores

CVSS v3.1 9.1 Critical

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

CVSS v3.0 8.1 High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS v2.0 6.4 Medium

AV:N/AC:L/Au:N/C:N/I:P/A:P

Exploitation Status

Exploited in the wild

Recorded 2025-07-27 00:00:00 UTC · The Shadowserver

Proof of concept available

Recorded 2026-06-12 14:20:18 UTC · Nuclei Templates

Weaknesses (CWE)

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Scanner Integrations

Nuclei, Metasploit, and other scanner references for this CVE are listed on the Detection tab.

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

SCIMono <0.0.19 - Remote Code Execution

nuclei · Created Unknown

Timeline

Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.

12 Jun 2026 14:20 UTC about 2 months ago

12 Jun 2026 14:20 UTC · about 2 months ago

Public PoC available

Public proof-of-concept code published
27 Jul 2025 00:00 UTC about 1 year ago

27 Jul 2025 00:00 UTC · about 1 year ago

Added to KEVIntel KEV Feed

High-confidence, third-party attested exploitation
25 Apr 2025 00:00 UTC over 1 year ago

25 Apr 2025 00:00 UTC · over 1 year ago

Nuclei template available

Scanner coverage available
9 Feb 2021 20:49 UTC over 5 years ago

9 Feb 2021 20:49 UTC · over 5 years ago

CVE published

Vulnerability disclosed publicly
30 Dec 2020 00:00 UTC over 5 years ago

30 Dec 2020 00:00 UTC · over 5 years ago

CVE ID reserved

Identifier reserved by the CNA

Automate This Intelligence with the Pro API

Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Pro API Example

GET /api/v2/pro/kevs/CVE-2021-21479

{
  "cve_id": "CVE-2021-21479",
  "title": "In SCIMono before 0.0.19, it is possible for an attacker to inject and execut...",
  "affected_vendor": "SAP SE",
  "affected_product": "SCIMono",
  "affected_versions": [
    { "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
  ],
  "confidence": "High",
  "cvss_score": 9.1,
  "epss_score": 0.10116,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "...": "Pro API fields" },
  "proof_of_concepts": [ "..." ],
  "scanner_integrations": [ "..." ]
}

The free JSON API returns basic KEV fields only. Confidence, telemetry, and artifact enrichment require Pro API access.

CVE-2021-21479

At a Glance

Affected Versions

CVE References