CVE-2026-27064Patch

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Editor Arbitrary File Upload in Mailster <= 4.1.17 versions.

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0.5/ 10 priority

Sources & remediation

Other references

https://patchstack.com/database/wordpress/plugin/mailster/vulnerability/wordpress-mailster-plugin-4-1-17-arbitrary-file-upload-vulnerability?_s_id=cve

Weakness type (CWE)

CWE-434

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-27064

Full discourse1 post

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters91d
Patch
#CVE-2026-27064 - Critical arbitrary file upload in Mailster <= 4.1.17. CVSS 9.1. No patch available. Disable or restrict access immediately. #CVEAlert #sysadmin #devops #devsecops #developer #git #github #gitlab #linux #python #poland https://www.valtersit.com/cve/CVE-2026-27064 #infosec #Mailster
Post summary
A critical CVE-2026-27064 vulnerability in Mailster (<=4.1.17) permits arbitrary file upload; no patch exists, so administrators should disable or restrict access immediately.
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