CVE-2020-17496

9.8 CRITICAL CISA KEV - Actively Exploited

Published: August 12, 2020 Modified: November 07, 2025

Description

vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. NOTE: this issue exists because of an incomplete fix for CVE-2019-16759.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/

Source: cve@mitre.org

Exploit Third Party Advisory

https://cwe.mitre.org/data/definitions/78.html

Source: cve@mitre.org

Technical Description

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4445227-vbulletin-5-6-0-5-6-1-5-6-2-security-patch

Source: cve@mitre.org

Patch Vendor Advisory

https://seclists.org/fulldisclosure/2020/Aug/5

Source: cve@mitre.org

Exploit Mailing List Third Party Advisory

https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory

https://cwe.mitre.org/data/definitions/78.html

Source: af854a3a-2127-422b-91ae-364da2661108

Technical Description

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4445227-vbulletin-5-6-0-5-6-1-5-6-2-security-patch

Source: af854a3a-2127-422b-91ae-364da2661108

Patch Vendor Advisory

https://seclists.org/fulldisclosure/2020/Aug/5

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Mailing List Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17496

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

9 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

94.0%

100th percentile

Exploitation Status

Actively Exploited

Remediation due: 2022-05-03

Weaknesses (CWE)

CWE-74 CWE-74

Affected Vendors

vbulletin

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