CVE-2021-4271
Published: 21 December 2022
Summary
CVE-2021-4271 is a low-severity Improper Neutralization (CWE-707) vulnerability in W2Wiki Project W2Wiki. Its CVSS base score is 3.5 (Low).
Operationally, ranked at the 43.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-34113
Vulnerability details
A vulnerability was found in panicsteve w2wiki. It has been rated as problematic. Affected by this issue is the function toHTML of the file index.php of the component Markdown Handler. The manipulation leads to cross site scripting. The attack may…
more
be launched remotely. The name of the patch is 8f1d0470b4ddb1c7699e3308e765c11ed29542b6. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216476.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Enforces use of documented standards and tool configurations that address proper neutralization of inputs/outputs during development.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.