Mortgage Calculator / Loan Calculator < 1.5.17 - Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.5.17
- Affected Plugin
- Mortgage Calculator / Loan Calculator
- Affected Version
< 1.5.17- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24828
At a glance
CVE-2021-24828 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Mortgage Calculator / Loan Calculator WordPress plugin, affecting versions < 1.5.17. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.5.17; sites on affected versions should update now. Disclosed November 2021, reported by apple502j.
Vulnerability Overview
The Mortgage Calculator / Loan Calculator WordPress plugin before 1.5.17 does not escape the some of the attributes of its mlcalc shortcode before outputting them, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks.
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 Mortgage Calculator / Loan Calculator < 1.5.17 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 Mortgage Calculator / Loan Calculator the fix is 1.5.17: builds < 1.5.17 are affected, anything from 1.5.17 onward is not.
Remediation
Update to version 1.5.17, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Mortgage Calculator / Loan Calculator: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Mortgage Calculator / Loan Calculator 1.5.17 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
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