6.1
MEDIUM
CVE-2019-16521
"WordPress Broken Link Checker Reflected XSS"
Description

The broken-link-checker plugin through 1.11.8 for WordPress (aka Broken Link Checker) is susceptible to Reflected XSS due to improper encoding and insertion of an HTTP GET parameter into HTML. The filter function on the page listing all detected broken links can be exploited by providing an XSS payload in the s_filter GET parameter in a filter_id=search request. NOTE: this is an end-of-life product.

INFO

Published Date :

Oct. 16, 2019, 3:15 p.m.

Last Modified :

Nov. 21, 2024, 4:30 a.m.

Remotely Exploitable :

Yes !

Impact Score :

2.7

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2019-16521 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Managewp broken_link_checker
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-16521.

URL Resource
http://www.openwall.com/lists/oss-security/2019/10/16/3 Exploit Mailing List Third Party Advisory
https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker Exploit Third Party Advisory
https://wordpress.org/plugins/broken-link-checker/#developers Product Third Party Advisory
https://wpvulndb.com/vulnerabilities/9917 Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/10/16/3 Exploit Mailing List Third Party Advisory
https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker Exploit Third Party Advisory
https://wordpress.org/plugins/broken-link-checker/#developers Product Third Party Advisory
https://wpvulndb.com/vulnerabilities/9917 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-16521 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-16521 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2019/10/16/3
    Added Reference https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker
    Added Reference https://wordpress.org/plugins/broken-link-checker/#developers
    Added Reference https://wpvulndb.com/vulnerabilities/9917
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Oct. 18, 2019

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type http://www.openwall.com/lists/oss-security/2019/10/16/3 No Types Assigned http://www.openwall.com/lists/oss-security/2019/10/16/3 Exploit, Mailing List, Third Party Advisory
    Changed Reference Type https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker No Types Assigned https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker Exploit, Third Party Advisory
    Changed Reference Type https://wordpress.org/plugins/broken-link-checker/#developers No Types Assigned https://wordpress.org/plugins/broken-link-checker/#developers Product, Third Party Advisory
    Changed Reference Type https://wpvulndb.com/vulnerabilities/9917 No Types Assigned https://wpvulndb.com/vulnerabilities/9917 Third Party Advisory
    Added CWE NIST CWE-79
    Added CPE Configuration OR *cpe:2.3:a:managewp:broken_link_checker:*:*:*:*:*:wordpress:*:* versions up to (including) 1.11.8
  • CVE Modified by [email protected]

    Oct. 16, 2019

    Action Type Old Value New Value
    Added Reference https://wpvulndb.com/vulnerabilities/9917 [No Types Assigned]
    Added Reference http://www.openwall.com/lists/oss-security/2019/10/16/3 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-16521 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-16521 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.20 }} -0.01%

score

0.57196

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability