CVE-2022-23980

Yasr – Yet Another Stars Rating <= 2.9.9 - Cross-Site Scripting via source

2022-02-03 21:54

Strategic Overview

Status: Patched in 3.0.0
Affected Plugin: YASR – Yet Another Star Rating Plugin for WordPress
Affected Version: <= 2.9.9
CVSS: 4.7Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2022-23980

View all YASR – Yet Another Star Rating Plugin for WordPress vulnerabilities

At a glance

CVE-2022-23980 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the YASR WordPress plugin, affecting versions <= 2.9.9. It carries a CVSS score of 4.7 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.0.0; sites on affected versions should update now. Disclosed February 2022, reported by Thura Moe Myint (mgthuramoemyint).

Vulnerability Overview

Cross-Site Scripting (XSS) vulnerability discovered in Yasr – Yet Another Stars Rating WordPress plugin (versions <= 2.9.9), vulnerable at parameter 'source'.

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')

YASR <= 2.9.9 carries this weakness at source, and reaching it 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 YASR the fix is 3.0.0: builds <= 2.9.9 are affected, anything from 3.0.0 onward is not.

Remediation

Update to version 3.0.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to YASR: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: YASR 3.0.0 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-23980 https://www.wordfence.com/threat-intel/vulnerabilities/id/cabe5d20-710c-47d7-a5a3-562287ab5706 https://nvd.nist.gov/vuln/detail/CVE-2022-23980

Related records

Same weakness class

Other vulnerabilities in YASR – Yet Another Star Rating Plugin for WordPress

CVSS Vector

4.7

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

Base

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

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