CVE-2021-24994

Migration, Backup, Staging – WPvivid <= 0.9.68 - Unauthenticated Stored Cross-Site Scripting

2022-01-31 00:00
Krzysztof Zając

Strategic Overview

Status
Patched in 0.9.69
Affected Plugin
WPvivid — Backup, Migration & Staging
Affected Version
< 0.9.69
CVSS
6.1Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24994
View all WPvivid — Backup, Migration & Staging vulnerabilities

At a glance

CVE-2021-24994 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WPvivid WordPress plugin, affecting versions < 0.9.69. 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 0.9.69; sites on affected versions should update now. Disclosed January 2022, reported by Krzysztof Zając.

Vulnerability Overview

The Migration, Backup, Staging – WPvivid plugin before 0.9.69 does not have authorisation when adding remote storages, and does not sanitise as well as escape a parameter from such unauthenticated requests before outputting it in admin page, 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 privileges on the target site.

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

Reaching this weakness in WPvivid < 0.9.69 takes no account at all. 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 WPvivid the fix is 0.9.69: builds < 0.9.69 are affected, anything from 0.9.69 onward is not.

Remediation

Update to version 0.9.69, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WPvivid 0.9.69 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24994https://www.wordfence.com/threat-intel/vulnerabilities/id/15ce5666-f020-4264-989d-713e4520e012https://nvd.nist.gov/vuln/detail/CVE-2021-24994

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C