CVE-2021-24987

Social Share, Social Login and Social Comments < 7.13.30 - Reflected Cross-Site Scripting

2022-03-15 00:00

Strategic Overview

Status: Patched in 7.13.30
Affected Plugin: Social Share, Social Login and Social Comments Plugin – Super Socializer
Affected Version: < 7.13.30
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24987

View all Social Share, Social Login and Social Comments Plugin – Super Socializer vulnerabilities

At a glance

CVE-2021-24987 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Social Share, Social Login and Social Comments Plugin WordPress plugin, affecting versions < 7.13.30. 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 7.13.30; sites on affected versions should update now. Disclosed March 2022, reported by Krzysztof Zając.

Vulnerability Overview

The Social Share, Social Login and Social Comments Plugin WordPress plugin before 7.13.30 does not sanitise and escape the urls parameter in its the_champ_sharing_count AJAX action (available to both unauthenticated and authenticated users) before outputting it back in the response, 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 Social Share, Social Login and Social Comments Plugin < 7.13.30 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 Social Share, Social Login and Social Comments Plugin the fix is 7.13.30: builds < 7.13.30 are affected, anything from 7.13.30 onward is not.

Remediation

Update to version 7.13.30, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Social Share, Social Login and Social Comments Plugin: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Social Share, Social Login and Social Comments Plugin 7.13.30 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24987 https://www.wordfence.com/threat-intel/vulnerabilities/id/4fd4d30b-f37f-4083-acfe-8e85c075da10 https://nvd.nist.gov/vuln/detail/CVE-2021-24987

Related records

Same weakness class

Other vulnerabilities in Social Share, Social Login and Social Comments Plugin – Super Socializer

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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