CVE-2021-24924

Email Log <= 2.4.7 - Reflected Cross-Site Scripting

2021-11-08 00:00

Strategic Overview

Status: Patched in 2.4.8
Affected Plugin: Email Log
Affected Version: <= 2.4.7
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24924

At a glance

CVE-2021-24924 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Email Log WordPress plugin, affecting versions <= 2.4.7. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.4.8; sites on affected versions should update now. Disclosed November 2021, reported by ZhongFu Su.

Vulnerability Overview

The Email Log WordPress plugin before 2.4.8 does not escape the d parameter before outputting it back in an attribute in the Log page, leading to a Reflected 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 privileges on the target site.

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

Reaching this weakness in Email Log <= 2.4.7 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 Email Log the fix is 2.4.8: builds <= 2.4.7 are affected, anything from 2.4.8 onward is not.

Remediation

Update to version 2.4.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Email Log: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Email Log 2.4.8 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24924 https://www.wordfence.com/threat-intel/vulnerabilities/id/6042e3d9-cced-43b8-8b3c-eaca9855b842 https://nvd.nist.gov/vuln/detail/CVE-2021-24924

Related records

Same weakness class

6.4Email Log <= 2.2.2 Stored Cross-Site Scripting

Other vulnerabilities in Email Log

CVSS Vector

6.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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