MSRXVulnerabilities / CVE-2025-66376
CVE-2025-66376
Published 2026-01-05 · published (not yet in NVD)
CVE-2025-66376
Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-03-18, with a fix-by date of 2026-04-01. Patch it first.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
7.2 HIGH
CVSS 3.1 · CNA
CVSS 3.1 · CNA
20%
chance of exploitation in the next 30 days (EPSS; higher than 97% of CVEs)
chance of exploitation in the next 30 days (EPSS; higher than 97% of CVEs)
Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
Scores
Affected products
- Zimbra Collaboration: 10.0 to < 10.0.18; 10.1 to < 10.1.13
Weakness: CWE-79
5 references (advisories, patches, write-ups)
Sources: CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.