CVE-2021-33852: A cross-site scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user's browser and can u

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-33852 is a medium-severity flaw (CVSS 5.4) affecting post duplicator. 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 and can use an application as the vehicle for the attack. The XSS payload given in the "Duplicate Title" text box executes whenever the user opens the Settings Page of the Post Duplicator Plugin or the application root page after duplicating any of the existing posts.

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	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-03-10
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2022-03-10 17:42 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

metaphorcreations post duplicator DOWNGRADE

Affected: 2.23

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.23

1. Check installed version

apt-cache policy post-duplicator || rpm -q post-duplicator || post-duplicator --version

2. No fixed release: DOWNGRADE to a release before 2.23 (Debian / Ubuntu)

apt-cache madison post-duplicator sudo apt install post-duplicator=<VERSION_BEFORE_2.23> sudo apt-mark hold post-duplicator

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

dnf --showduplicates list post-duplicator sudo dnf downgrade post-duplicator-<VERSION_BEFORE_2.23> sudo dnf versionlock add post-duplicator

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-2021-33852?

post duplicator: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-33852 being exploited?

CVE-2021-33852 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-2021-33852 affect?

CVE-2021-33852 affects post duplicator. Severity is medium (CVSS 5.4). A cross-site scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user's browser and can use an application as the vehicle for the attack. The XSS payload given in the "Duplicate Title" text box executes whenever the use

How urgent is CVE-2021-33852?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2025-24736 MEDIUM 4.3 UPGRADE Missing Authorization vulnerability in metaphorcreations Post Duplicator post-duplicator allows Exploiting Inc
CVE-2024-12472 MEDIUM 4.3 UPGRADE The Post Duplicator plugin for WordPress is vulnerable to Information Exposure in all versions up to, and incl
CVE-2023-49835 MEDIUM 4.3 UPGRADE Missing Authorization vulnerability in Metaphor Creations Post Duplicator allows Exploiting Incorrectly Config
CVE-2016-15027 LOW 3.5 DOWNGRADE A vulnerability was found in meta4creations Post Duplicator Plugin 2.18 on WordPress

References

← Back to latest CVEs