Security readout for executives and security teams
Plain-English summary
This issue affects Roundcube webmail before 1.3.7. Its encrypted-mail plugin mishandled GnuPG integrity warnings, which could make it easier for an attacker to obtain sensitive information from protected messages. The public bundle does not provide CVSS scoring or confirmed exploitation evidence.
Executive priority
Treat this as a targeted confidentiality issue for legacy Roundcube deployments. It is not supported as actively exploited in the provided sources, but encrypted mail and webmail access can carry high business sensitivity, so affected systems should be upgraded promptly.
Technical view
CVE-2018-19205 is associated with Roundcube’s Enigma GnuPG driver at plugins/enigma/lib/enigma_driver_gnupg.php. Versions before 1.3.7 mishandle MDC integrity-protection warnings from GnuPG. The source describes it as related to CVE-2017-17688, but does not provide detailed attack prerequisites.
Likely exposure
Organizations are exposed if they run Roundcube webmail older than 1.3.7, especially where the Enigma/GnuPG encrypted-mail functionality is present. Exposure depends on actual Roundcube deployment and plugin use, which the source bundle does not enumerate.
Exploitation context
The source bundle and KEV flag do not support a claim of active exploitation. Public details indicate a confidentiality risk involving encrypted mail handling, but the bundle does not include exploit maturity, attacker prerequisites, or weaponized proof details.
Researcher notes
Evidence is limited to the CVE description and Roundcube 1.3.7 release references. No CVSS, CWE, CPE list, exploit status, or detailed patch diff is included in the bundle. Validate real exposure through version and plugin configuration.
Mitigation direction
- Upgrade Roundcube installations older than 1.3.7.
- Review Roundcube 1.3.7 release notes and vendor guidance.
- Inventory whether the Enigma/GnuPG plugin is enabled.
- Prioritize internet-facing webmail and sensitive-mail environments.
- Track this finding with related encrypted-mail handling risks.
Validation and detection
- Confirm deployed Roundcube versions are 1.3.7 or later.
- Identify all public and internal Roundcube instances.
- Check whether plugins/enigma is installed or enabled.
- Verify encrypted-mail workflows handle integrity warnings after upgrade.
- Record absence or presence of vendor-documented compensating controls.
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.
CVE-2018-19205 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://roundcube.net/news/2018/07/27/update-1.3.7-releasedCVE reference · x_refsource_MISC
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.7CVE reference · x_refsource_MISC
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.