Security readout for executives and security teams
Plain-English summary
SOGo Web Mail versions before 4.3.1 can expose users to cross-site scripting when they read a malicious email. An attacker could potentially access sensitive user information or alter browser-visible content in the user’s session. The issue requires user interaction and is rated medium severity.
Executive priority
Treat this as a medium-priority webmail risk. Prioritize remediation where SOGo is internet-facing, widely used, or handles sensitive communications, but there is no source-backed evidence here of active exploitation.
Technical view
CVE-2020-22402 is a CWE-79 XSS issue in SOGo Web Mail before 4.3.1. The CVSS 3.1 score is 6.1 with network attack vector, low complexity, no privileges required, and required user interaction. The vulnerable path is email reading with malicious code in message content.
Likely exposure
Exposure is most likely in organizations running SOGo Web Mail before 4.3.1. The source bundle’s structured affected-product metadata is incomplete, so confirm exposure through deployed package or application version data.
Exploitation context
The bundle does not show KEV listing or cited evidence of active exploitation. The attack requires a user to read a malicious email, so practical risk is tied to targeted mail delivery and exposed webmail users.
Researcher notes
The public bundle is sparse: it identifies SOGo Web Mail before 4.3.1 and a vendor bug reference, but affected CPE metadata is unavailable. Avoid assuming broader SOGo components are affected without vendor confirmation.
Mitigation direction
- Inventory SOGo Web Mail deployments and identify versions older than 4.3.1.
- Upgrade affected SOGo Web Mail instances to 4.3.1 or later.
- Review the vendor bug reference for any additional operational guidance.
- Monitor webmail accounts for suspicious session or mailbox activity.
Validation and detection
- Confirm the deployed SOGo Web Mail version on each relevant server.
- Verify upgraded systems report version 4.3.1 or later.
- Review mail-security alerts for suspicious messages targeting SOGo users.
- Check whether webmail is internet-accessible or limited to trusted networks.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2020-22402 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
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://sogo.nu/bugs/view.php?id=4979CVE reference
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.