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Robokassa Payment Gateway CVE-2026-91017

| EUVDEUVD-2026-81386 LOW
Insufficient Verification of Data Authenticity (CWE-345)
2026-09-17 WPScan GHSA-x78w-xrx4-7hrf
3.7
CVSS 3.1 · Vendor: WPScan

Severity by source

Vendor (WPScan) PRIMARY
3.7 LOW
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI
3.7 LOW

Network-reachable and unauthenticated (AV:N/PR:N/UI:N); AC:H because the non-default deferred-payment feature must be enabled; integrity-only order forgery (I:L), no confidentiality or availability impact.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (WPScan).

CVSS VectorVendor: WPScan

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

5
Patch available
Sep 17, 2026 - 08:16 EUVD
Metadata Corrected
Sep 17, 2026 - 07:40 vuln.today
tag: Woocommerce added
Metadata Corrected
Sep 17, 2026 - 07:40 vuln.today
tag: Information Disclosure removed
Analysis Generated
Sep 17, 2026 - 07:36 vuln.today
CVE Published
Sep 17, 2026 - 07:05 cve.org
LOW 3.7

DescriptionCVE.org

The Robokassa payment gateway for Woocommerce WordPress plugin before 1.8.9 does not verify the authenticity of incoming payment notifications when its non-default deferred-payment feature is enabled, allowing unauthenticated attackers to forge a notification and mark arbitrary WooCommerce orders as paid or on-hold without payment or a valid signature.

AnalysisAI

Forged payment notifications against the Robokassa payment gateway for WooCommerce (all versions before 1.8.9) let unauthenticated remote attackers mark arbitrary WooCommerce orders as paid or on-hold without a real payment or a valid Robokassa signature. The flaw is only reachable when the plugin's non-default deferred-payment feature is explicitly enabled; default installations do not expose the vulnerable notification path. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitable ONLY when the plugin's non-default 'deferred-payment' feature is explicitly enabled; on default configurations the vulnerable notification path is not reachable. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuinely low-priority issue despite being a signature/authentication-verification bypass. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: 1.8.9 - upgrading the Robokassa payment gateway for WooCommerce to 1.8.9 or later restores signature verification on the notification handler and is the primary fix; administrators should update via the WordPress plugin dashboard or WPScan-referenced release and confirm the installed version afterwards (advisory: https://wpscan.com/vulnerability/1aeef0b4-9b14-4b03-b7f6-a05937622023/). … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-91017 vulnerability details – vuln.today

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