CVE-2024-33535: An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0

This month

HIGH 7.5REMOTEUPGRADE

CVE-2024-33535 is a high-severity flaw (CVSS 7.5) affecting collaboration. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability involves unauthenticated local file inclusion (LFI) in a web application, specifically impacting the handling of the packages parameter. Attackers can exploit this flaw to include arbitrary local files without authentication, potentially leading to unauthorized access to sensitive information. The vulnerability is limited to files within a specific directory.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-22
Published	2024-08-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zimbra

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-12 15:15 UTCPublished CVE record published
2026-06-17 07:31 UTCUpdated Record last modified

zimbra collaboration UPGRADE

Affected: >= 10.0.0 and < 10.0.8 · 9.0.0 · 9.0.0 p0 · 9.0.0 p1 · 9.0.0 p10 · 9.0.0 p11 · 9.0.0 p12 · 9.0.0 p13

Fixed in: 10.0.8

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy collaboration || rpm -q collaboration || collaboration --version

2. UPGRADE to 10.0.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade collaboration

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade collaboration

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison collaboration sudo apt install collaboration=<VERSION_BEFORE_9.0.0> sudo apt-mark hold collaboration

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list collaboration sudo dnf downgrade collaboration-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add collaboration

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-33535?

collaboration: upgrade to 10.0.8. Exact commands for each OS are on this page.

Is CVE-2024-33535 being exploited?

CVE-2024-33535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-33535 affect?

CVE-2024-33535 affects collaboration. Severity is high (CVSS 7.5). An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability involves unauthenticated local file inclusion (LFI) in a web application, specifically impacting the handling of the packages parameter. Attackers can exp

How urgent is CVE-2024-33535?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Software pages

Zimbra vulnerabilities

Related CVEs

CVE-2025-67809 MEDIUM 4.7 UPGRADE An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1
CVE-2025-27914 MEDIUM 5.4 UPGRADE An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1
CVE-2024-45515 MEDIUM 6.1 UPGRADE An issue was discovered in Zimbra Collaboration (ZCS) through 10.1
CVE-2024-33536 MEDIUM 5.4 UPGRADE An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0
CVE-2024-33533 MEDIUM 5.4 UPGRADE An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0, issue 1 of 2

References

← Back to latest CVEs