Security readout for executives and security teams
Plain-English summary
Affected WooCommerce stores may let customers buy wallet credit for less than its credited value. Attackers could inflate store balances and spend them on goods or services, creating direct financial loss and accounting discrepancies. The issue affects Wallet for WooCommerce versions before 1.6.10.
Executive priority
Prioritize remediation immediately on affected commerce sites because successful abuse can translate directly into fraudulent purchasing and revenue loss. Disable top-ups if a prompt update is impossible, then reconcile transactions. There is no confirmed active exploitation in the supplied evidence, but the low-complexity financial impact warrants urgent action.
Technical view
The plugin credits the requested top-up value without verifying the amount actually collected after discounts. This authorization and payment-validation failure can let a customer obtain excess wallet balance. The supplied record assigns CVSS 9.1, with high confidentiality and integrity impact and no availability impact.
Likely exposure
Exposure is limited to WooCommerce sites running Wallet for WooCommerce before 1.6.10 where customers can top up wallets. Risk is greatest when checkout discounts can reduce top-up payments. The bundle does not establish how many sites are exposed or whether every payment configuration is vulnerable.
Exploitation context
The WPScan reference is tagged as containing exploit information, but the supplied evidence does not establish active exploitation. The CVE is not listed as KEV in the bundle. Treat practical abuse as plausible because the flaw is remotely reachable through customer-facing wallet top-ups, while distinguishing that from confirmed attacks.
Researcher notes
The affected range is stated as versions before 1.6.10, although the structured affected entry contains an inconsistent version value of “0” and defaults to unaffected. The title says Subscriber+, while the CVSS vector states no privileges required. Validate prerequisites against the CVE record, WPScan entry, and vendor behavior before final asset classification.
Mitigation direction
- Upgrade Wallet for WooCommerce to version 1.6.10 or later.
- Temporarily disable wallet top-ups if upgrading cannot be completed promptly.
- Check vendor guidance for additional configuration or remediation requirements.
- Reconcile recent top-up payments against credited wallet amounts and resulting purchases.
- Investigate and contain accounts showing unexplained wallet balance inflation.
Validation and detection
- Confirm the installed plugin version and whether Wallet for WooCommerce is active.
- Verify whether customer wallet top-ups and applicable checkout discounts are enabled.
- Compare collected payment amounts with wallet credits for recent top-up transactions.
- Review unusually discounted top-ups, rapid balance growth, and wallet-funded purchases.
- After updating, verify credits cannot exceed the amount actually collected.
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-284: 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 lookupCVE-2026-16538 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
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.
SSVC decision data
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:N/UI:N/S:U/C:H/I:H/A:N3.95.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://wpscan.com/vulnerability/bc87bb91-a0c4-4d35-8be1-6d3ec2623a86/CVE reference, WPScan · exploit, vdb-entry
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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.