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CVE Record

CVE-2021-32790: Blind SQL Injection possible via Authenticated Web-hook Search API Endpoint

Woocommerce is an open source eCommerce plugin for WordPress. An SQL injection vulnerability impacts all WooCommerce sites running the WooCommerce plugin between version 3.3.0 and 3.3.6. Malicious actors (already) having admin access, or API keys to the WooCommerce site can exploit vulnerable endpoints of `/wp-json/wc/v3/webhooks`, `/wp-json/wc/v2/webhooks` and other webhook listing API. Read-only SQL queries can be executed using this exploit, while data will not be returned, by carefully crafting `search` parameter information can be disclosed using timing and related attacks. Version 3.3.6 is the earliest version of Woocommerce with a patch for this vulnerability. There are no known workarounds other than upgrading.

MediumCVSS 4.9Not KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-32790 lets a logged-in WooCommerce administrator, or someone with WooCommerce API keys, infer sensitive database information through a blind SQL injection in webhook search APIs. It does not return data directly, but timing-based techniques may disclose information. The fix identified in the sources is upgrading to WooCommerce 3.3.6 or later.

Executive priority

Treat this as a targeted confidentiality risk, not a broad unauthenticated emergency. Prioritize patching any old WooCommerce deployments, especially revenue-generating stores or sites with many administrators or long-lived API keys.

Technical view

WooCommerce versions 3.3.0 through below 3.3.6 are affected by blind SQL injection in webhook listing endpoints, including /wp-json/wc/v3/webhooks and /wp-json/wc/v2/webhooks. The vulnerable search parameter can influence read-only SQL queries. CVSS is 4.9 because exploitation requires high privileges, but confidentiality impact is high.

Likely exposure

Exposure is limited to WooCommerce sites running versions >= 3.3.0 and < 3.3.6. Practical risk is highest where admin accounts or WooCommerce API keys are broadly shared, weakly controlled, or suspected compromised.

Exploitation context

The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires existing admin access or valid API keys. The issue is still meaningful because a trusted or compromised privileged identity could infer database information without direct query output.

Researcher notes

The evidence supports a blind SQL injection in authenticated webhook search APIs with read-only query execution and timing-based disclosure. Sources do not provide exploit code, active exploitation evidence, or workarounds beyond upgrade. Validate exposure by version and privileged API access paths.

Mitigation direction

  • Upgrade affected WooCommerce sites to version 3.3.6 or later.
  • Check WooCommerce vendor guidance before relying on any workaround.
  • Tighten admin and API key access while upgrade work is pending.
  • Review WooCommerce API keys and revoke unused or suspicious keys.

Validation and detection

  • Inventory WooCommerce plugin versions across all WordPress sites.
  • Confirm no production site runs WooCommerce >= 3.3.0 and < 3.3.6.
  • Identify exposed WooCommerce webhook API endpoints on affected sites.
  • Review admin users and WooCommerce API key holders for unnecessary access.
Prepared
Confidence
high
Sources
4

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · medium confidence lookup

CWE-89: Database access and collection lookup

Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Database behavior lookup

The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-32790 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.9 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2021-32790Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
woocommercewoocommerce>= 3.3.0, < 3.3.6Listed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.