CVE-2021-24421

WP JobSearch <= 1.7.3 - Stored Cross-Site Scripting

2021-05-19 00:00

Strategic Overview

Status: Patched in 1.7.4
Affected Plugin: JobSearch WP Job Board
Affected Version: < 1.7.4
CVSS: 6.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24421

View all JobSearch WP Job Board vulnerabilities

At a glance

CVE-2021-24421 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the JobSearch WP Job Board WordPress plugin, affecting versions < 1.7.4. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.7.4; sites on affected versions should update now. Disclosed May 2021, reported by R3N0.

Vulnerability Overview

The WP JobSearch WordPress plugin before 1.7.4 did not sanitise or escape multiple of its parameters from the my-resume page before outputting them in the page, allowing low privilege users to use JavaScript payloads in them and leading to a Stored Cross-Site Scripting issue

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in JobSearch WP Job Board < 1.7.4 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For JobSearch WP Job Board the fix is 1.7.4: builds < 1.7.4 are affected, anything from 1.7.4 onward is not.

Remediation

Update to version 1.7.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to JobSearch WP Job Board: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: JobSearch WP Job Board 1.7.4 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24421 https://www.wordfence.com/threat-intel/vulnerabilities/id/b2a537a9-a1db-465e-8e04-2306e0d6998c https://nvd.nist.gov/vuln/detail/CVE-2021-24421

Related records

Same weakness class

Other vulnerabilities in JobSearch WP Job Board

CVSS Vector

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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