CVE-2018-12940

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-31 · updated 2026-06-17
Weakness: CWE-434

Description

Unrestricted file upload vulnerability in "op/op.UploadChunks.php" in SeedDMS (formerly LetoDMS and MyDMS) before 5.1.8 allows remote attackers to execute arbitrary code by uploading a file with an executable extension specified by the "qqfile" parameter. This allows an authenticated attacker to upload a malicious file containing PHP code to execute operating system commands to the web root of the application.

Affected products

Seeddms: before 5.1.8 — fixed in 5.1.8

How to fix

Upgrade to a fixed version: Seeddms 5.1.8. Check the vendor advisory for mitigations.

References

https://sourceforge.net/p/seeddms/code/ci/seeddms-5.1.x/tree/CHANGELOG
https://www.contextis.com/resources/advisories/cve-2018-12940
https://sourceforge.net/p/seeddms/code/ci/seeddms-5.1.x/tree/CHANGELOG
https://www.contextis.com/resources/advisories/cve-2018-12940

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