CWE · MITRE source
CWE-1021Improper Restriction of Rendered UI Layers or Frames
The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.
Last updated: 04 July 2026 00:28 UTC
Cumulative inbound coverage
How completely the frameworks we cross-walk collectively cover this — the verdict is the strongest single mapping (overlapping partials are not summed); breadth shows the corroboration behind it.
Collective: mostly · 7 mapping(s) from 3 framework(s): CAPEC 5 (mostly) · OWASP-Web 1 (mostly) · ATT&CK 1 (partial)
OWASP Top 10 for Web (2025)
This weakness contributes to A06:2025 Insecure Design.
NIST 800-53 r5 controls that address this weakness (0)AI
| Control | Title | Family | Why it addresses this CWE |
|---|---|---|---|
| No NIST controls proposed yet. | |||
MITRE ATT&CK techniques this weakness enables
Our own two-way CWE↔ATT&CK cross-walk — a direct mapping with no public source (the CWE→CAPEC→ATT&CK chain leaves most top weaknesses, incl. XSS and SQLi, mapped to nothing). Drafted by Grok and spot-checked by Claude Opus 4.8.
Direction: ← other covers this;
→ this covers other (F/M/P = full / mostly /
partial).
Top CVEs of this weakness type, ranked by Risk Priority
| CVE | Risk | CVSS | EPSS | Published |
|---|---|---|---|---|
CVE-2016-2496 | 7.0 | 9.8 | 0.0091 | 2016-06-13 |
CVE-2021-21111 | 7.0 | 9.6 | 0.0106 | 2021-01-08 |
CVE-2021-21132 | 7.0 | 9.6 | 0.2341 | 2021-02-09 |
CVE-2021-23274 | 7.0 | 9.8 | 0.0118 | 2021-03-23 |
CVE-2021-43048 | 7.0 | 9.8 | 0.0124 | 2021-11-16 |
CVE-2024-10004 | 7.0 | 9.1 | 0.0038 | 2024-10-15 |
CVE-2011-1244 | 6.0 | 0.0 | 0.1514 | 2011-04-13 |
CVE-2018-7491 | 5.5 | 7.5 | 0.0112 | 2018-02-26 |
CVE-2018-9458 | 5.5 | 7.8 | 0.0057 | 2018-11-06 |
CVE-2018-9524 | 5.5 | 7.8 | 0.0018 | 2018-11-14 |
CVE-2018-18496 | 5.5 | 8.8 | 0.0118 | 2019-02-28 |
CVE-2017-16775 | 5.5 | 7.1 | 0.0107 | 2019-04-01 |
CVE-2019-3639 | 5.5 | 7.1 | 0.0124 | 2019-08-14 |
CVE-2019-2125 | 5.5 | 7.3 | 0.0014 | 2019-08-20 |
CVE-2019-16371 | 5.5 | 8.2 | 0.0118 | 2019-09-16 |
CVE-2015-5686 | 5.5 | 8.8 | 0.0045 | 2020-02-27 |
CVE-2020-0051 | 5.5 | 7.8 | 0.0017 | 2020-03-10 |
CVE-2020-7705 | 5.5 | 7.1 | 0.0117 | 2020-08-24 |
CVE-2020-0394 | 5.5 | 7.8 | 0.0027 | 2020-09-17 |
CVE-2020-0387 | 5.5 | 7.8 | 0.0047 | 2020-09-17 |
CVE-2020-0366 | 5.5 | 7.8 | 0.0041 | 2020-09-17 |
CVE-2020-13119 | 5.5 | 8.1 | 0.0083 | 2020-09-24 |
CVE-2020-27059 | 5.5 | 7.8 | 0.0021 | 2021-01-11 |
CVE-2021-0315 | 5.5 | 7.3 | 0.0028 | 2021-01-11 |
CVE-2021-0302 | 5.5 | 7.8 | 0.0070 | 2021-02-10 |