A cross-site scripting (XSS) vulnerability in Alinto SOGo, version 5.12.7

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Summary

CVECVE-2026-8496
StatePUBLISHED
Assignercertcc
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-13 19:17:30 UTC
Updated2026-05-13 19:17:30 UTC
DescriptionA cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS file, with an onrepeat event handler, is insufficiently sanitized before being rendered in the webmail interface. A remote attacker can execute JavaScript in the victim's browser when the malicious calendar invite is viewed. Successful exploitation may allow mailbox access, email and contact theft, session hijacking, and other actions allowed by an authenticated user.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CWE-116 Improper Encoding or Escaping of Output

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Alinto SOGo SOGo affected 5.12.8 custom Not specified

References

ReferenceSourceLinkTags
github.com/Alinto/sogo/releases/tag/SOGo-5.12.8 [email protected] github.com
github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86 [email protected] github.com
www.sogo.nu/news/2026/sogo-v5128-released.html [email protected] www.sogo.nu
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