CVE-2022-27926
MediumExploitedPublic exploitA reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
Published Apr 20, 2022 · Updated Sep 14, 2026
Key Facts
Patch immediately- CVE-2022-27926 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Zimbra Collaboration Suite (Synacor).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 30, 2023. Public exploit code is available.
- EPSS estimates a 18% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
18%
Higher than 97.1% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Apr 3, 2023 | Apr 24, 2023 | Not reported |
| Industry KEV feed | Mar 30, 2023 | Apr 24, 2023 | Not reported |
| CIRCL KEV | Apr 3, 2023 | Apr 24, 2023 | Not reported |
| ENISA EUVD | Apr 3, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
24 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Zimbra Collaboration SuiteSynacor | 9.0.0, 9.0.0-p1, 9.0.0-p10, 9.0.0-p11, 9.0.0-p12, 9.0.0-p13, 9.0.0-p14, 9.0.0-p15 | n/a |
Timeline
Publicly disclosed
Apr 20, 2022
Added to Industry KEV feed
Mar 30, 2023
Added to CISA KEV
Apr 3, 2023
Added to CIRCL KEV
Apr 3, 2023
Added to ENISA EUVD
Apr 3, 2023
Last updated
Sep 14, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/27xxx/CVE-2022-27926.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-27926
- advisoryhttps://wiki.zimbra.com/wiki/Security_Center
- advisoryhttps://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
- advisoryhttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
FAQ
Common Questions.
A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
Affected: Zimbra Collaboration Suite (Synacor) versions 9.0.0, 9.0.0-p1, 9.0.0-p10, 9.0.0-p11, 9.0.0-p12, 9.0.0-p13, 9.0.0-p14, 9.0.0-p15. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 30, 2023.
Yes. It was added on Apr 3, 2023 with a federal remediation due date of Apr 24, 2023.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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