How severe is CVE-2023-34193?

CVE-2023-34193 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-34193 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34193?

CVE-2023-34193 primarily affects Zimbra Collaboration. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-34193?

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-2023-34193 published?

CVE-2023-34193 was published on 2023-07-06 and last updated on 2026-06-17.

CVE-2023-34193

CVE-2023-34193 is a high-severity vulnerability in Zimbra Collaboration 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Zimbra Collaboration
Published: 2023-07-06
Last modified: 2026-06-17

Description

File Upload vulnerability in Zimbra ZCS 8.8.15 allows an authenticated privileged user to execute arbitrary code and obtain sensitive information via the ClientUploader function.

Frequently asked questions

What is CVE-2023-34193?: File Upload vulnerability in Zimbra ZCS 8.8.15 allows an authenticated privileged user to execute arbitrary code and obtain sensitive information via the ClientUploader function.
How severe is CVE-2023-34193?: CVE-2023-34193 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-34193 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34193?: CVE-2023-34193 primarily affects Zimbra Collaboration. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-34193?: 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-2023-34193 published?: CVE-2023-34193 was published on 2023-07-06 and last updated on 2026-06-17.

References

Affected products (37)

cpe:2.3:a:zimbra:collaboration:8.8.15:-:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p1:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p10:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p11:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p12:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p13:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p14:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p15:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p16:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p17:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p18:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p19:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p2:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p20:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p21:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p22:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p23:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p24:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p25:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p26:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p27:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p28:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p29:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p3:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p30:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p31:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p32:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p33:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p34:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p35:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p37:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p4:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p5:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p6:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p7:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p8:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration:8.8.15:p9:*:*:*:*:*:*

More vulnerabilities in Zimbra Collaboration

CVE-2023-29382 — Critical (CVSS 9.8): An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute arbitrary code via the…
CVE-2023-29381 — Critical (CVSS 9.8): An issue in Zimbra Collaboration (ZCS) v.8.8.15 and v.9.0 allows a remote attacker to escalate privileges and obtain…
CVE-2022-32294 — Critical (CVSS 9.8): Zimbra Collaboration Open Source 8.8.15 does not encrypt the initial-login randomly created password (from the "zmprove…
CVE-2021-35209 — Critical (CVSS 9.8): An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15…
CVE-2024-45518 — High (CVSS 8.8): An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before 10.0.9, 9.0.0 before Patch…
CVE-2024-27442 — High (CVSS 7.8): An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The zmmailboxdmgr binary, a component of ZCS, is…

All CVEs affecting Zimbra Collaboration →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →