Cyber Resilience

CVE-2026-49777

Published
05 June 2026
Modified
17 June 2026
CVSS Score v3.1 10.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.017 75th percentile
Risk Priority 81 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-49777 is a critical-severity Improper Validation of Specified Quantity in Input (CWE-1284) vulnerability. Its CVSS base score is 10.0 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 25% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-49777 is an improper validation of specified quantity in input vulnerability, tracked under CWE-1284, that affects the Product Slider Pro for WooCommerce plugin by ShapedPlugin, LLC. The flaw exists in all versions prior to 3.5.4 and permits implantation of malicious software. It carries a CVSS 3.1 score of 10.0, reflecting network attack vector, low complexity, no required privileges or user interaction, and changed scope with high impact on confidentiality, integrity, and availability.

An unauthenticated attacker reachable over the network can supply crafted input that bypasses quantity validation checks, resulting in unauthorized implantation of malicious code. Successful exploitation grants the attacker full control over the affected WordPress site, enabling arbitrary code execution, data exfiltration, or persistence mechanisms.

The single referenced advisory from Patchstack identifies the issue as a backdoor vulnerability in the plugin and points to version 3.5.4 as the corrective release. The EPSS score remains flat at 0.0655 with no material increase since disclosure.

EU & UK References

Vulnerability Data

Improper Validation of Specified Quantity in Input vulnerability in ShapedPlugin, LLC Product Slider Pro for WooCommerce allows Malicious Software Implanted. This issue affects Product Slider Pro for WooCommerce: from n/a before 3.5.4.

CWE(s)
CWE-1284

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
T1499 Endpoint Denial of Service Impact
Adversaries may perform Endpoint Denial of Service (DoS) attacks to degrade or block the availability of services to users.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-43793Shared CWE-1284
CVE-2021-43267Shared CWE-1284
CVE-2024-21953Shared CWE-1284
CVE-2026-27171Shared CWE-1284
CVE-2025-10094Shared CWE-1284
CVE-2023-31310Shared CWE-1284
CVE-2025-36428Shared CWE-1284
CVE-2025-46656Shared CWE-1284
CVE-2026-30573Shared CWE-1284
CVE-2023-30082Shared CWE-1284

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V6.7.2
  • V1.4.2
  • V2.1.1
  • V2.2.1

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

SI-10 requires validity checks on information inputs, directly stopping acceptance of malformed quantities before they can be used.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
prevents

Secure SDLC practices directly require proper quantity/length validation in input handling.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation for quantity fields, directly preventing CWE-1284.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for validation of size/length inputs, mitigating CWE-1284.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage robust input handling but do not specifically address quantity validation.

A.8.28 Secure coding partial match
prevents

Secure coding standards require explicit checks on numeric quantity inputs, fully addressing CWE-1284.

A.8.29 Security testing in development and acceptance partial match
finds

Security testing in development can detect missing quantity validation but does not itself implement the control.

References