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Vulnerability record · CVE-2026-49954 · published 15 June 2026

CVE-2026-49954: PHP remote file inclusion vulnerability

Discuz! X5.0 releases 20260320 through 20260610 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigger an exception during plugin installation to bypass sanitization routines, causing malicious paths to be stored unsanitized and subsequently passed to include(), which combined with file upload functionality escalates to arbitrary code execution in the context of the web server user.

8.6 CVSS 4.0 High EPSS 0.74% · top 47.3% CWE-98 · PHP remote file inclusion Deferred
8.6CVSS 4.0 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Discuz! X5.0 releases 20260320 through 20260610 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigger an exception during plugin installation to bypass sanitization routines, causing malicious paths to be stored unsanitized and subsequently passed to include(), which combined with file upload functionality escalates to arbitrary code execution in the context of the web server user.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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:

References

LinkTags
https://karmainsecurity.com/KIS-2026-11
https://karmainsecurity.com/chaining-bugs-in-discuz-from-race-condition-to-rce
https://www.vulncheck.com/advisories/discuz-x5-0-local-file-inclusion-via-enable-disable-php-plugin-directory
http://seclists.org/fulldisclosure/2026/Jun/5

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2026-87902WordPress Core Remote File Inclusion VulnerabilityAn unauthenticated attacker can make `get_page_template()` page-template resolution include a chosen readable local `.php` file outside the active th…KEVEPSS 18%8.8CVE-2025-68645Zimbra Webmail Classic UI RestFilter local file inclusionZimbra Collaboration Suite 10.0 and 10.1 mishandle user-supplied parameters in the RestFilter servlet of the Webmail Classic UI, allowing local file …KEVEPSS 49%analysed

Source: NIST National Vulnerability Database (record CVE-2026-49954), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.