Security readout for executives and security teams
Plain-English summary
CVE-2022-27926 is a reflected XSS flaw in Zimbra Collaboration 9.0. An unauthenticated attacker can make a user open a crafted link that runs attacker-controlled script in that user’s browser. CISA lists it as known exploited, so internet-facing Zimbra environments deserve prompt attention despite the medium CVSS score.
Executive priority
Treat this as a near-term remediation item for exposed Zimbra systems. Business urgency comes from CISA known-exploited status and the role of email platforms in credential, session, and phishing risk, not from availability impact.
Technical view
The issue is CWE-79 in /public/launchNewWindow.jsp. It accepts request parameters that can be reflected as arbitrary web script or HTML. The CVSS vector shows network access, low complexity, no privileges, required user interaction, changed scope, and low confidentiality/integrity impact with no availability impact.
Likely exposure
Organizations running Zimbra Collaboration 9.0 with the affected launchNewWindow.jsp component are the primary exposure. Risk is higher for externally reachable webmail portals where users can receive attacker-controlled links. The source bundle does not provide a complete affected-version matrix beyond ZCS 9.0.
Exploitation context
CISA KEV status supports known exploitation. The vulnerability still requires user interaction, so likely scenarios involve phishing or lure links targeting Zimbra users. The sources do not provide exploit volume, attacker attribution, or reliable details on exploit chaining.
Researcher notes
Evidence supports unauthenticated reflected XSS with user interaction in ZCS 9.0. The bundle does not include complete affected CPEs, patch confirmation text, exploit telemetry, or specific indicators of compromise. Avoid assuming broader Zimbra versions without vendor advisory confirmation.
Mitigation direction
- Identify all Zimbra Collaboration 9.0 internet-facing instances.
- Review Zimbra Security Advisories and 9.0.0 P24 notes for vendor-supported fixes.
- Apply the relevant Zimbra-supported update or mitigation guidance.
- Restrict unnecessary external access to Zimbra web interfaces where feasible.
- Prioritize user phishing controls for Zimbra-related links.
Validation and detection
- Confirm Zimbra product version and patch level on every exposed instance.
- Check whether /public/launchNewWindow.jsp is reachable externally.
- Review web logs for unusual requests to launchNewWindow.jsp parameters.
- Run only authorized, benign reflected-XSS validation in a controlled environment.
- Verify CISA KEV remediation deadlines apply to your environment.
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-2022-27926 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
- Yes
- 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.
CISA KEV status
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://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesCVE reference · x_refsource_MISC
- https://wiki.zimbra.com/wiki/Security_CenterCVE reference · x_refsource_MISC
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27926CVE reference · government-resource
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.