Security Digest · Vulnerability record · Known exploited
CVE-2025-27920: Srimax Output Messenger Directory Traversal Vulnerability
Exploited in the wild (CISA KEV). Output Messenger before 2.0.63 was vulnerable to a directory traversal attack through improper file path handling.
CISA KEV · added 2025-05-19 CVSS 7.2 High EPSS 1.9% · p79
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Srimax Output Messenger. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-05-19, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-06-09; treat that as the outer limit, not the target.
- EPSS 1.9%, percentile 79: FIRST’s model estimates a 1.9% chance of exploitation activity in the next 30 days, higher than 79% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
Output Messenger before 2.0.63 was vulnerable to a directory traversal attack through improper file path handling. By using ../ sequences in parameters, attackers could access sensitive files outside the intended directory, potentially leading to configuration leakage or arbitrary file access.
CISA’s summary
Srimax Output Messenger contains a directory traversal vulnerability that allows an attacker to access sensitive files outside the intended directory, potentially leading to configuration leakage or arbitrary file access.
Weakness type: CWE-24, CWE-22.
Product: Srimax Output Messenger · Assigned by: mitre · Published: 2025-05-05
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Srimax | Output Messenger | < 2.0.63 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| mitre | 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-05-19; federal due date 2025-06-09. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 1.86% probability of exploitation activity in the next 30 days; percentile 79.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (outputmessenger.com) outputmessenger.com
Vulnerability records
- CVE.org record CVE-2025-27920 cve.org
- NVD entry CVE-2025-27920 nvd.nist.gov
Government
Other references from the CVE record and advisory
- srimax.com srimax.com
- microsoft.com microsoft.com
All exploited Srimax vulnerabilities · Today’s Security Digest