CVE-2026-49954
highpriority · track · 0EPSS 0.005 · 44 %ileEUEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://karmainsecurity.com/KIS-2026-11cnnvd
- https://karmainsecurity.com/chaining-bugs-in-discuz-from-race-condition-to-rcecnnvd
- https://www.vulncheck.com/advisories/discuz-x5-0-local-file-inclusion-via-enable-disable-php-plugin-directorycnnvd
- https://karmainsecurity.com/KIS-2026-11enisa_euvd
- https://karmainsecurity.com/chaining-bugs-in-discuz-from-race-condition-to-rceenisa_euvd
- https://www.vulncheck.com/advisories/discuz-x5-0-local-file-inclusion-via-enable-disable-php-plugin-directoryenisa_euvd
- http://seclists.org/fulldisclosure/2026/Jun/5nvd
- https://karmainsecurity.com/KIS-2026-11nvd
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