What is CVE-2018-12943?

CVE-2018-12943 is a medium-severity vulnerability in Seeddms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-31.

How severe is CVE-2018-12943?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2018-12943 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Seeddms

CVE-2018-12943

Cross-Site Scripting (XSS) vulnerability in every page that includes the "action" URL parameter in SeedDMS (formerly LetoDMS and MyDMS) before 5.1.8 allows remote attackers to inject arbitrary web script or HTML via the action parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-07-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Seeddms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.contextis.com/resources/advisories/cve-2018-12943 (Third Party Advisory)
sourceforge.net/p/seeddms/code/ci/seeddms-5.1.x/tree/CHANGELOG (Third Party Advisory)

Frequently asked questions

What is CVE-2018-12943?: CVE-2018-12943 is a medium-severity vulnerability in Seeddms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-31.
How severe is CVE-2018-12943?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2018-12943 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.