CVE-2024-33536: An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0

Routine

MEDIUM 5.4UPGRADE

CVE-2024-33536 is a medium-severity flaw (CVSS 5.4) 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 occurs due to inadequate input validation of the res parameter, allowing an authenticated attacker to inject and execute arbitrary JavaScript code within the context of another user's browser session. By uploading a malicious JavaScript file, accessible externally, and crafting a URL containing its location in the res parameter, the attacker can exploit this vul

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
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-2024-33536?

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

Is CVE-2024-33536 being exploited?

CVE-2024-33536 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-2024-33536 affect?

CVE-2024-33536 affects collaboration. Severity is medium (CVSS 5.4). An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability occurs due to inadequate input validation of the res parameter, allowing an authenticated attacker to inject and execute arbitrary JavaScript code within

How urgent is CVE-2024-33536?

Priority 23/100. No elevated risk signals yet.

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-2024-33535 HIGH 7.5 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

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