CVE-2016-20101

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 33.7% of scored records. A rank, not a probability.

NVD base score

9.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-27.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-20 20:31Z8 DAYS AGO

Last updated

2026-10-27 11:05Z2 DAYS AGO

Reserved

2026-10-14

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')Variant

Data version

5.2

Document digest

8d80782bc2660dbebf2071ecb59eb0dc43dcddb451a2df236825060c88e0cb1a

• packetstorm.newsPacket Storm 136398https://packetstorm.news/files/id/136398/exploit
• cxsecurity.comCXSecurity WLB-2016030131https://cxsecurity.com/issue/WLB-2016030131exploit
• github.comNuclei Templatehttps://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wordpress/issuu-panel-lfi.yamltechnical-description
• wordpress.orgWordPress Download Pagehttps://wordpress.org/plugins/issuu-panel/product
• www.vulncheck.comVulnCheck Advisory: Issuu Panel WordPress Plugin < 1.6.6 File Inclusion via ajax-docs.phphttps://www.vulncheck.com/advisories/issuu-panel-wordpress-plugin-1.6.6-file-inclusion-via-ajax-docs-phpthird-party-advisory