CVE-2023-37580 kev in the critical feed json
Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
published 2023-07-31 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-41465
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Exploited
- added 2023-07-27
- epss
- 49.1%
- EPSS 49.1% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
Patch / fix
cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
- Found exploited as a 0-day (Project Zero)
- 0-day patched (Project Zero)
- Added to CISA KEV
- Published
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 3 y ago
- Patch by
- 2023-08-17 (3 y ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- Synacor, Zimbra Collaboration Suite (ZCS)
- CISA name
- Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Found
- 2023-06-29
- Patched
- 2023-07-26
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
49.08% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Zimbra Collaboration Suite (ZCS) v.8.8.15 - Cross-Site Scripting nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
openwall.com
/lists/oss-security/2023/11/17/2
mailing-list, patch
-
wiki.zimbra.com
/wiki/Security_Center
release-notes
-
wiki.zimbra.com
/wiki/Zimbra_Responsible_Disclosure_Policy
not-applicable
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-37580
government-resource, us-government-resource
Sources
- CVE List CVE-2023-37580
- NVD CVE-2023-37580
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.