Answer in brief
CVE-2026-16962 records a Medium severity (CVSS 5.3) vulnerability in Tamara Checkout <= 1.9.9.20 - Unauthenticated Order Status Manipulation. The current sources do not mark it as known exploited. The current feed maps Unknown/Tamara Checkout (generic), Unknown/Tamara Checkout (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/Tamara Checkout (generic), Unknown/Tamara Checkout (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Tamara Checkoutgeneric | >=0 <=1.9.9.20 | Not reported |
| Unknown/Tamara Checkoutgeneric | 0 | Not reported |
Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 21, 2026
The Tamara Checkout WordPress plugin through 1.9.9.20 does not verify the order key, a nonce, or any capability on its public payment cancel/fail return URLs, changing a WooCommerce order's status based solely on an attacker-supplied numeric order id, so an unauthenticated attacker can cancel or fail arbitrary orders store-wide by enumerating ids (triggering downstream stock-release and notification side-effects).
Quoted source text, attributed separately from HOL analysis.