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TI-2026-84126 Aliases CVE-2026-120597GHSA-49rc-rvj9-jhxw

Cross-site scripting in Welcart e-Commerce Plugin payment error page

Priority MEDIUM 63CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting, Code execution
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79 and CWE-94.

Summary

Welcart e-Commerce Plugin for WordPress from 2.12.0 before 2.12.7 is affected. The function ESCOTT_MAIN::error_page_message outputs the ResponseCd argument without escaping it, a cross-site scripting flaw (CWE-79). A remote attacker can run script in a user's browser if the user interacts with a crafted page. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00596 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed e-Commerce Plugin (Welcart): 2.12.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
uscnanbue-Commerce Plugin2.12.0; 2.12.1; 2.12.2; 2.12.3; 2.12.4; 2.12.5; 2.12.62.12.7Patch availableCNA
  • e-Commerce Plugin Vendoruscnanbu Affected 2.12.0; 2.12.1; 2.12.2; 2.12.3; 2.12.4; 2.12.5; 2.12.6 Fixed in 2.12.7 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:welcart:e-commerce_plugin:*:*:*:*:*:*:*:*——uscnanbu
  • cpe:2.3:a:welcart:e-commerce_plugin:*:*:*:*:*:*:*:* Versions — — ·uscnanbu

Remediation

Upgrade Welcart e-Commerce Plugin to version 2.12.7, which escapes the value with esc_html() before output.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA e-Commerce Plugin (Welcart) Fixed in 2.12.7

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-120597
  2. 2026-11-03 Alias added: GHSA-49rc-rvj9-jhxw
  3. 2026-11-03 CISA SSVC decision points changed
  4. 2026-11-03 Priority changed: LOW → MEDIUM

References

Exploit 1

Patch 1

  • TI-2023-05484 Welcart e-Commerce < 2.9.5 - Subscriber+ Arbitrary File Upload CVSS 3.1HIGH 8.8
  • TI-2022-03880 Welcart e-Commerce < 2.8.6 - Subscriber+ PHAR Deserialisation CVSS 3.1HIGH 8.8
  • TI-2022-03786 Welcart e-Commerce < 2.8.5 - Unauthenticated Arbitrary File Access CVSS 3.1HIGH 7.5
  • TI-2022-03879 Welcart e-Commerce < 2.8.5 - Subscriber+ Arbitrary File Access CVSS 3.1MEDIUM 6.5
  • TI-2022-03618 Welcart e-Commerce < 2.8.4 - Subscriber+ Arbitrary Shipping Method Creation/Update/Deletion CVSS 3.1MEDIUM 6.5
  • TI-2023-05482 Welcart e-Commerce < 2.9.5 - Reflected XSS CVSS 3.1MEDIUM 6.1
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences