How severe is CVE-2015-6541?

CVE-2015-6541 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-6541 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6541?

CVE-2015-6541 affects Zimbra Zimbra Collaboration Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6541?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6541 published?

CVE-2015-6541 was published on 2016-04-08 and last updated on 2026-06-17.

CVE-2015-6541

CVE-2015-6541 is a high-severity vulnerability in Zimbra Zimbra Collaboration Server with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Zimbra Zimbra Collaboration Server
Published: 2016-04-08
Last modified: 2026-06-17

Description

Multiple cross-site request forgery (CSRF) vulnerabilities in the Mail interface in Zimbra Collaboration Server (ZCS) before 8.5 allow remote attackers to hijack the authentication of arbitrary users for requests that change account preferences via a SOAP request to service/soap/BatchRequest.

Frequently asked questions

What is CVE-2015-6541?: Multiple cross-site request forgery (CSRF) vulnerabilities in the Mail interface in Zimbra Collaboration Server (ZCS) before 8.5 allow remote attackers to hijack the authentication of arbitrary users for requests that change account preferences via a SOAP request to service/soap/BatchRequest.
How severe is CVE-2015-6541?: CVE-2015-6541 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-6541 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6541?: CVE-2015-6541 affects Zimbra Zimbra Collaboration Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6541?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-6541 published?: CVE-2015-6541 was published on 2016-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zimbra:zimbra_collaboration_server:*:*:*:*:*:*:*:*

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