CVE-2026-33372 json
An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1.
published 2026-03-20 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-13698
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A cross-site request forgery (CSRF) vulnerability exists in Zimbra Webmail due to improper validation of CSRF tokens. The application accepts CSRF tokens supplied within the request body instead of requiring them through the expected request header. An attacker can exploit this issue by tricking an authenticated user into submitting a crafted request. This may allow unauthorized actions to be performed on behalf of the victim.
Patch / fix
- synacor zimbra_collaboration_suite 10.1.16
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
wiki.zimbra.com
/wiki/Zimbra_Security_Advisories
vendor-advisory
-
wiki.zimbra.com
/wiki/Security_Center
release-notes, vendor-advisory
-
wiki.zimbra.com
/wiki/Zimbra_Responsible_Disclosure_Policy
product
-
wiki.zimbra.com
/wiki/Zimbra_Releases/10.1.16#Security_Fixes
release-notes
Sources
- CVE List CVE-2026-33372
- NVD CVE-2026-33372
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