# CVE-2026-120597: Welcart e-Commerce Plugin paymentESCOTT.main.class.php error_page_message cross site scripting

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

A vulnerability was identified in Welcart e-Commerce Plugin up to 2.12.6 on WordPress. This affects the function ESCOTT_MAIN::error_page_message of the file classes/paymentESCOTT.main.class.php. Such manipulation of the argument ResponseCd leads to cross site scripting. The attack can be launched remotely. The exploit is publicly available and might be used. Upgrading to version 2.12.7 mitigates this issue. It is recommended to upgrade the affected component. The value is now escaped with esc_html() before output. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://wordpress.org/plugins/usc-e-shop/

## Affected products and versions

- Welcart / e-Commerce Plugin: 2.12.0 (affected); 2.12.1 (affected); 2.12.2 (affected); 2.12.3 (affected); 2.12.4 (affected); 2.12.5 (affected); 2.12.6 (affected); 2.12.7 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 4.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N; source: NVD: cna@vuldb.com

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:N; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79, CWE-94

## Exploit evidence

- exploit: https://github.com/bevennyamande/welcart-poc (CNA: VulDB)

## References

- https://vuldb.com/vuln/429933 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/429933/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-120597 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1039186 (CNA: VulDB; third-party-advisory)

- https://github.com/bevennyamande/welcart-poc (CNA: VulDB; exploit)

- https://wordpress.org/plugins/usc-e-shop/ (CNA: VulDB; patch)

- https://github.com/bevennyamande/welcart-poc (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-120597 (cna@vuldb.com)

- https://vuldb.com/submit/1039186 (cna@vuldb.com)

- https://vuldb.com/vuln/429933 (cna@vuldb.com)

- https://vuldb.com/vuln/429933/cti (cna@vuldb.com)

- https://wordpress.org/plugins/usc-e-shop/ (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-120597; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120597; retrieved 2026-11-03; source updated 2026-11-02

Revision: 89a5abf10be4239c6810f5e79bef59f604a2414c92f9087a8df3a4395656adb0

Canonical: https://y2.dev/cve/CVE-2026-120597

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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