CVE-2021-40438

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2021-40438

Confirmed

Yes

2021-12-01 00:00 UTC

Timestamps

2021-12-01

2021-12-01

Scope

KEV entry: Apache HTTP Server-Side Request Forgery (SSRF) | Affected: Apache / Apache | Description: A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier. | Required action: Apply updates per vendor instructions. | Due date: 2021-12-15 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-40438

References
  • {'id': 'CVE-2021-40438', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-40438'}

95af384b-7aba-4d32-b24f-c51a8b507e7c

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 13:26 UTC

2026-02-06 07:53 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-918"
  ],
  "date_added": "2021-12-01",
  "due_date": "2021-12-15",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Apache",
  "vendorProject": "Apache",
  "vulnerabilityName": "Apache HTTP Server-Side Request Forgery (SSRF)"
}
 -
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