Zimbra fixes 1 vulnerability

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[TLP:CLEAR] Zimbra fixes 1 vulnerability

Zimbra fixes 1 vulnerability in version 10.1.19 [1]. Details on applying the fix can be found at [2]. Users upgrading from versions 10.0.x, 9.0.x and 8.8.15 to the fixed version who previously applied the SNMP mitigation steps must reapply the updated steps [1].

Zimbra - XSS

CVSS 6.1 (Medium)

Allows an unauthenticated remote attacker to carry out a stored XSS attack against the recipient of specially crafted e-mails sent by the attacker. The vulnerability is exploitable only on instances that use the Classic Web Client interface [1].

The vulnerability is present in product:

Zimbra; <=10.1.19;

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

More information:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') at cwe.mitre.org

The vulnerability was publicly disclosed 7. 7. 2026.

Links

By CESNET, z.s.p.o. Martin Krajči on 13. 7. 2026.

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[TLP:CLEAR] Zimbra fixes 1 vulnerability

Zimbra - XSS

CVSS 6.1 (Medium)

Links