Auth bypass in Zimbra Collaboration
CVE-2023-26562
In Zimbra Collaboration (ZCS) 8.8.15 and 9.0, a closed account (with 2FA and generated passwords) can send e-mail messages when configured for Imap/smtp.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Zimbra Collaboration — versions 8.8.15, 9.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wiki.zimbra.com/wiki/Zimbra_Security_Advisories (Vendor Advisory)
- wiki.zimbra.com/wiki/Security_Center (Release Notes)
- wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy (Product)
Frequently asked questions
- What is CVE-2023-26562?
- CVE-2023-26562 is a medium-severity vulnerability in Zimbra Collaboration, classified under Missing Authorization. CVSS score: 6.5/10. Published 2024-02-13.
- How severe is CVE-2023-26562?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-26562 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.