CVE-2018-12939

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% 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-22

Description

A directory traversal flaw in SeedDMS (formerly LetoDMS and MyDMS) before 5.1.8 allows an authenticated attacker to write to (or potentially delete) arbitrary files via a .. (dot dot) in the "op/op.UploadChunks.php" "qquuid" parameter. NOTE: this can be leveraged to execute arbitrary code by using CVE-2018-12940.

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-2018-12939
https://sourceforge.net/p/seeddms/code/ci/seeddms-5.1.x/tree/CHANGELOG
https://www.contextis.com/resources/advisories/cve-2018-12939

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