Security readout for executives and security teams
Plain-English summary
EverSync 0.5 can expose files stored under its public files directory to anyone on the network or internet. Sources specifically note database files such as db.sq3 may be downloaded, potentially exposing application data and credentials. This is a confidentiality-focused issue with no authentication required.
Executive priority
Prioritize internet-facing EverSync 0.5 instances for immediate review. The main business risk is silent exposure of stored application data and credentials. If EverSync is internal-only and access-controlled, urgency is lower but still requires validation and cleanup.
Technical view
CVE-2018-25164 is a CWE-552 exposure of sensitive information in Phpmassmail EverSync 0.5. The application allows unauthenticated direct access to files in the files directory. The CVSS 4.0 score is 8.7, reflecting network access, low complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is most likely where EverSync 0.5 is internet-facing or reachable by untrusted users. Systems with sensitive application databases or credential material stored in the accessible files directory have the highest risk. The sources only identify EverSync 0.5 as affected.
Exploitation context
A public Exploit-DB entry is listed, so public exploit information exists. The CVE is not marked as CISA KEV in the provided data, and no cited source states active exploitation. The vulnerability does not require authentication or user interaction, increasing opportunistic risk if exposed.
Researcher notes
The record is straightforward but sparse: affected product and version are identified, and the weakness is direct file exposure. No official vendor patch is named in the provided sources. Avoid assuming broader versions or products are affected without additional evidence.
Mitigation direction
- Check vendor guidance for EverSync 0.5 updates or official remediation.
- Restrict web access to the files directory immediately.
- Remove sensitive database or credential files from publicly reachable paths.
- Limit EverSync access to trusted networks where business use requires it.
- Consider replacing or retiring EverSync 0.5 if no supported fix exists.
Validation and detection
- Inventory systems for Phpmassmail EverSync version 0.5.
- Confirm whether EverSync is reachable from the internet or untrusted networks.
- Review web server configuration for public access to the files directory.
- Check whether database files such as db.sq3 are present in reachable paths.
- Review access logs for unexpected requests to sensitive files.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-552: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-25164 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-45868CVE reference · exploit
- VulnCheck Advisory: EverSync 0.5 Arbitrary File Download via files DirectoryCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Files or Directories Accessible to External Parties
Files or Directories Accessible to External Parties represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.