CVE-2021-33849: A Cross-Site Scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user’s browser while the

This month

MEDIUM 5.4DOWNGRADE

CVE-2021-33849 is a medium-severity flaw (CVSS 5.4) affecting zoho crm lead magnet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Cross-Site Scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user’s browser while the browser is connected to a trusted website. The attack targets your application's users and not the application itself while using your application as the attack's vehicle. The XSS payload executes whenever the user changes the form values or deletes a created form in Zoho CRM Lead Magnet Version 1.7.2.4.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-10-05
Last modified	2026-06-17

Publisher (CNA): Cyber Security Works Pvt. Ltd. · Vendor: zohocorp

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

Am I affected?

Timeline

2021-10-05 22:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

zohocorp zoho crm lead magnet DOWNGRADE

Affected: 1.7.2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.2.4

1. Check installed version

apt-cache policy zoho-crm-lead-magnet || rpm -q zoho-crm-lead-magnet || zoho-crm-lead-magnet --version

2. No fixed release: DOWNGRADE to a release before 1.7.2.4 (Debian / Ubuntu)

apt-cache madison zoho-crm-lead-magnet sudo apt install zoho-crm-lead-magnet=<VERSION_BEFORE_1.7.2.4> sudo apt-mark hold zoho-crm-lead-magnet

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zoho-crm-lead-magnet sudo dnf downgrade zoho-crm-lead-magnet-<VERSION_BEFORE_1.7.2.4> sudo dnf versionlock add zoho-crm-lead-magnet

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-2021-33849?

zoho crm lead magnet: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-33849 being exploited?

CVE-2021-33849 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-2021-33849 affect?

CVE-2021-33849 affects zoho crm lead magnet. Severity is medium (CVSS 5.4). A Cross-Site Scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user’s browser while the browser is connected to a trusted website. The attack targets your application's users and not the application itself while using

How urgent is CVE-2021-33849?

Priority 40/100. Public exploit reference

Software pages

Zoho ManageEngine vulnerabilities

Related CVEs

CVE-2022-41978 HIGH 8.8 UPGRADE Auth

References

← Back to latest CVEs