CVE-2021-24493: The shopp_upload_file AJAX action of the Shopp WordPress plugin through 1.4, available to both unauthenticated

Q: How do I fix CVE-2021-24493?

shopp: upgrade to newer than 1.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-24493 being exploited?

CVE-2021-24493 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24493 affect?

CVE-2021-24493 affects shopp. Severity is critical (CVSS 9.8). The shopp_upload_file AJAX action of the Shopp WordPress plugin through 1.4, available to both unauthenticated and authenticated user does not have any security measure in place to prevent upload of malicious files, such as PHP, allowing un

Q: How urgent is CVE-2021-24493?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-24493 is a critical-severity flaw (CVSS 9.8) affecting shopp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The shopp_upload_file AJAX action of the Shopp WordPress plugin through 1.4, available to both unauthenticated and authenticated user does not have any security measure in place to prevent upload of malicious files, such as PHP, allowing unauthenticated users to upload arbitrary files and leading to RCE

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-09-13
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: ingenesis

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

Am I affected?

Timeline

2021-09-13 18:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

ingenesis shopp UPGRADE

Affected: <= 1.4

Fixed in: newer than 1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade shopp

Note

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

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-2021-24493?

shopp: upgrade to newer than 1.4. Exact commands for each OS are on this page.

Is CVE-2021-24493 being exploited?

CVE-2021-24493 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-2021-24493 affect?

CVE-2021-24493 affects shopp. Severity is critical (CVSS 9.8). The shopp_upload_file AJAX action of the Shopp WordPress plugin through 1.4, available to both unauthenticated and authenticated user does not have any security measure in place to prevent upload of malicious files, such as PHP, allowing un

How urgent is CVE-2021-24493?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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