Vulnerability Details : CVE-2021-39357
The Leaky Paywall WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via the ~/class.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 4.16.5. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-39357
- cpe:2.3:a:zeen101:leaky_paywall:*:*:*:*:*:wordpress:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-39357
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-39357
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
|
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
2.3
|
2.7
|
Wordfence |
CWE ids for CVE-2021-39357
-
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: security@wordfence.com (Primary)
References for CVE-2021-39357
-
https://wordfence.com/vulnerability-advisories/#CVE-2021-39357
Vulnerability Advisories - WordfenceThird Party Advisory
-
https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php
Changeset 2615195 for leaky-paywall/trunk/class.php – WordPress Plugin RepositoryPatch;Third Party Advisory
-
https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md
word-press/Leaky Paywall.md at main · BigTiger2020/word-press · GitHubExploit;Third Party Advisory
Jump to