Dromara UJCMS UserController UserController.java usernameExist improper authorization

published 2026-09-20 last mo. modified 2026-09-21 last mo. also EUVD-2026-83650

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

A security flaw has been discovered in Dromara UJCMS up to 12.3.1. The affected element is the function usernameExist of the file ujcms-cms/src/main/java/com/ujcms/cms/core/web/api/UserController.java of the component UserController. Performing a manipulation of the argument Username results in improper authorization. It is possible to initiate the attack remotely. The project was informed of the problem early through an issue report but has not responded yet.

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CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: last mo. (2026-09-21)

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:R
CNA	3.0	5.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:R
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N/E:ND/RL:ND/RC:UR
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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:X/V:X/RE:X/U:X
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

Dromara UJCMS

Classification

Weakness

CWE-285 Improper Authorization
CWE-266 Incorrect Privilege Assignment

References

vuldb.com /vuln/407920
vdb-entry, technical-description
vuldb.com /vuln/407920/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-93961
third-party-advisory
vuldb.com /submit/944238
third-party-advisory
github.com /dromara/ujcms/issues/22
issue-tracking
github.com /dromara/ujcms/
product

Sources

CVE List CVE-2026-93961
NVD CVE-2026-93961

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