Vulnerability Details : CVE-2021-4271
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 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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-4271
- cpe:2.3:a:w2wiki_project:w2wiki:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4271
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4271
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
2.1
|
1.4
|
VulDB | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-4271
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by: cna@vuldb.com (Secondary)
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by:
- cna@vuldb.com (Secondary)
- nvd@nist.gov (Primary)
-
The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.Assigned by: cna@vuldb.com (Secondary)
References for CVE-2021-4271
-
https://vuldb.com/?id.216476
Third Party Advisory
-
https://github.com/panicsteve/w2wiki/commit/8f1d0470b4ddb1c7699e3308e765c11ed29542b6
Add Markdown sanitization to close XSS vulnerability; credit to Marku… · panicsteve/w2wiki@8f1d047 · GitHubPatch;Third Party Advisory
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