CWE · MITRE source
CWE-87Improper Neutralization of Alternate XSS Syntax
The product does not neutralize or incorrectly neutralizes user-controlled input for alternate script syntax.
Last updated: 04 July 2026 08:17 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: full · 2 mapping(s) from 2 framework(s): CAPEC 1 (full) · ATT&CK 1 (partial)
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-2023-35156 | 7.0 | 9.6 | 0.0208 | 2023-06-23 |
CVE-2023-35158 | 7.0 | 9.6 | 0.0205 | 2023-06-23 |
CVE-2023-35159 | 7.0 | 9.6 | 0.0218 | 2023-06-23 |
CVE-2023-35160 | 7.0 | 9.6 | 0.0227 | 2023-06-23 |
CVE-2023-35161 | 7.0 | 9.6 | 0.0238 | 2023-06-23 |
CVE-2026-42235 UPD | 7.0 | 9.6 | 0.0033 | 2026-05-04 |
CVE-2025-49137 UPD | 5.5 | 8.5 | 0.0023 | 2025-06-09 |
CVE-2025-55291 UPD | 5.5 | 7.1 | 0.0022 | 2025-08-18 |
CVE-2026-33506 | 5.5 | 8.8 | 0.0043 | 2026-03-26 |
CVE-2026-33510 | 5.5 | 8.8 | 0.0023 | 2026-04-06 |
CVE-2026-35534 | 5.5 | 7.6 | 0.0017 | 2026-04-07 |
CVE-2026-40321 | 5.5 | 8.0 | 0.0760 | 2026-04-17 |
CVE-2026-46492 UPD | 5.5 | 7.2 | 0.0021 | 2026-06-09 |
CVE-2026-55237 | 5.5 | 8.8 | 0.0019 | 2026-06-18 |
CVE-2020-5298 | 3.5 | 4.0 | 0.0091 | 2020-06-03 |
CVE-2021-40131 | 3.5 | 5.5 | 0.0070 | 2021-11-19 |
CVE-2022-36033 | 3.5 | 6.1 | 0.0121 | 2022-08-29 |
CVE-2022-39295 | 3.5 | 6.1 | 0.0053 | 2022-10-13 |
CVE-2022-20963 | 3.5 | 5.4 | 0.0043 | 2022-11-04 |
CVE-2023-20188 | 3.5 | 4.8 | 0.0048 | 2023-06-28 |
CVE-2023-20208 | 3.5 | 4.8 | 0.0046 | 2023-11-21 |
CVE-2023-50712 | 3.5 | 4.6 | 0.0030 | 2023-12-22 |
CVE-2023-6446 | 3.5 | 4.4 | 0.0030 | 2024-01-11 |
CVE-2024-25640 UPD | 3.5 | 4.6 | 0.0034 | 2024-02-19 |
CVE-2024-3162 UPD | 3.5 | 6.4 | 0.0032 | 2024-04-03 |