Security readout for executives and security teams
CVE-2016-5303 is an XSS flaw in Horde’s Text Filter API. A remote attacker could inject script or HTML through crafted content in specific attributes. For organizations still running affected Horde Groupware or Horde Groupware Webmail Edition before 5.2.16, the business risk is account abuse or data exposure through users’ browsers. Exposure is most likely in legacy Horde Groupware or Horde Groupware Webmail Edition deployments below version 5.2.16, especially internet-facing webmail portals. Treat as a legacy webmail hygiene issue with moderate urgency. Prioritize remediation if Horde is internet-facing, handles sensitive mail, or remains below 5.2.16. Mitigation focus: Upgrade Horde Groupware and Webmail Edition to 5.2.16 or later.; Review Horde’s 2016 security announcements and referenced commits for patch context.; Retire or isolate unsupported Horde deployments where upgrading is not feasible..
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
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ATT&CK lookup starting points
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CVE-2016-5303 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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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://github.com/horde/horde/commit/30d5506c20d26efbb9942fbdc6f981a0bd333b97CVE reference · x_refsource_CONFIRM
- https://github.com/horde/horde/commit/4d8176d1e9ef5cbd2b3fcacd9b9a4c8e482fb424CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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