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Home/Vulnerability/CVE-2026-49973

CVE-2026-49973

Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings

Published: Jun 11, 2026Updated: Jun 11, 2026 Sources: CVE List
NVD MITRE
9.4CVSS
CRITICAL

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable network can send a POST request to the settings endpoint during the first-run setup window to persist an arbitrary password hash, obtain a valid session cookie, and lock out the legitimate operator from their own instance.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low

Weaknesses

CWE-306Missing Authentication for Critical Function

Affected Products

hermes-webui
nesquena
Web & CMS Plugins / cms-core
nesquenacommercialWeb & CMS Pluginsaka hermes webui, hermes-webui

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/nesquena/hermes-webui/releases/tag/v0.51.358
github.com
https://github.com/nesquena/hermes-webui/pull/3964
github.com
https://github.com/nesquena/hermes-webui/pull/3973
github.com
and 2 more references View all →

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