Security readout for executives and security teams
Plain-English summary
This issue lets any authenticated WordPress user with subscriber-level access or higher change WooCommerce product prices through the WooCommerce Multi Currency plugin. The main business risk is unauthorized price manipulation, which can affect revenue, customer trust, and order accuracy.
Executive priority
Treat this as a moderate-priority ecommerce integrity issue. It is not described as unauthenticated or actively exploited, but unauthorized price changes can create direct financial loss and operational cleanup work.
Technical view
CVE-2021-4379 is a CWE-862 missing authorization flaw in the wmc_bulk_fixed_price function of villatheme CURCY/WooCommerce Multi Currency through version 2.1.17. Network access, low privileges, and no user interaction are required. CVSS 3.1 is 6.5 with high integrity impact.
Likely exposure
Exposure is likely limited to WordPress WooCommerce sites running WooCommerce Multi Currency/CURCY versions up to and including 2.1.17, especially sites allowing customer accounts, subscribers, contributors, or other low-privilege logins.
Exploitation context
The source bundle states authenticated attackers with subscriber-level permissions and above can change product prices. It does not cite active exploitation, and CISA KEV status is false, so active exploitation should not be assumed from the provided evidence.
Researcher notes
The key control failure is missing capability enforcement around wmc_bulk_fixed_price. Evidence supports integrity impact only; confidentiality and availability impact are not described. The bundle does not provide exploit details or a precise fixed version.
Mitigation direction
- Inventory WordPress sites using WooCommerce Multi Currency or CURCY.
- Upgrade away from versions up to and including 2.1.17 using vendor guidance.
- Restrict WordPress account creation and remove unnecessary low-privilege accounts.
- Review WooCommerce product price changes for unauthorized modifications.
- Check Wordfence, vendor, and NinTechNet guidance for exact fixed-version details.
Validation and detection
- Confirm whether the plugin is installed and identify its exact version.
- Review user roles with subscriber-level access or higher.
- Verify low-privilege users cannot change product prices in staging.
- Inspect WooCommerce product price history and administrative logs.
- Confirm production is no longer running version 2.1.17 or older.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-4379 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e2318ae9-4115-442e-9293-a9251787c5f3?source=cveCVE reference
- https://codecanyon.net/item/woocommerce-multi-currency/20948446CVE reference
- https://blog.nintechnet.com/vulnerability-fixed-in-wordpress-woocommerce-multi-currency-plugin/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.