CVE-2021-47892
Published: 23 January 2026
Summary
CVE-2021-47892 is a medium-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 5.1 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 22.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2021-47892 is a stored cross-site scripting (XSS) vulnerability affecting PEEL Shopping version 9.3.0. The flaw resides in the 'Comments / Special Instructions' parameter on the purchase page, where attackers can inject malicious JavaScript payloads. These payloads execute when the affected page is refreshed, enabling client-side script execution. The vulnerability is rated with a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N) and is associated with CWE-79.
Unauthenticated attackers can exploit this vulnerability remotely over the network with low complexity and no user interaction required. By submitting a malicious payload via the vulnerable parameter during a purchase, the script is stored and persists for subsequent page views. This allows execution in the context of other users' browsers, potentially leading to impacts such as limited confidentiality and integrity violations through client-side script execution.
Advisories and related resources include a VulnCheck advisory detailing the stored XSS in PEEL Shopping's Comments/Special Instructions, an Exploit-DB entry (exploit 49574) demonstrating the issue, and an archived PEEL.fr page. These references confirm the vulnerability but do not specify patch details in the provided information; security practitioners should consult them for mitigation guidance, such as input sanitization or upgrading to a patched version.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4284
Vulnerability details
PEEL Shopping 9.3.0 contains a stored cross-site scripting vulnerability in the 'Comments / Special Instructions' parameter of the purchase page. Attackers can inject malicious JavaScript payloads that will execute when the page is refreshed, potentially allowing client-side script execution.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stored XSS in public web app directly enables remote exploitation of the application (T1190) and client-side JavaScript execution in victim browsers (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of untrusted input such as the Comments/Special Instructions field to block script injection before storage.
Requires output filtering/encoding of stored content so that malicious JavaScript payloads cannot execute in users' browsers on page refresh.
Provides mechanisms to detect and block malicious code (including injected scripts) from being processed or rendered by the application.