CVE-2018-5212: The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload_thumbnail (aka File T

This month

MEDIUM 5.4DOWNGRADE

CVE-2018-5212 is a medium-severity flaw (CVSS 5.4) affecting simple download monitor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload_thumbnail (aka File Thumbnail) parameter in an edit action to wp-admin/post.php.

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	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-01-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simple download monitor project

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

Am I affected?

Timeline

2018-01-04 18:29 UTCPublished CVE record published
2026-06-17 01:59 UTCUpdated Record last modified

simple download monitor project simple download monitor DOWNGRADE

Affected: 3.5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.4

1. Check installed version

apt-cache policy simple-download-monitor || rpm -q simple-download-monitor || simple-download-monitor --version

2. No fixed release: DOWNGRADE to a release before 3.5.4 (Debian / Ubuntu)

apt-cache madison simple-download-monitor sudo apt install simple-download-monitor=<VERSION_BEFORE_3.5.4> sudo apt-mark hold simple-download-monitor

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

dnf --showduplicates list simple-download-monitor sudo dnf downgrade simple-download-monitor-<VERSION_BEFORE_3.5.4> sudo dnf versionlock add simple-download-monitor

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-2018-5212?

simple download monitor: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-5212 being exploited?

CVE-2018-5212 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-2018-5212 affect?

CVE-2018-5212 affects simple download monitor. Severity is medium (CVSS 5.4). The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload_thumbnail (aka File Thumbnail) parameter in an edit action to wp-admin/post.php.

How urgent is CVE-2018-5212?

Priority 40/100. Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

Related CVEs

CVE-2021-24698 MEDIUM 4.3 UPGRADE The Simple Download Monitor WordPress plugin before 3.9.6 allows users with a role as low as Contributor to re
CVE-2021-24697 MEDIUM 6.1 UPGRADE The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the 1) sdm_active_tab GET parameter
CVE-2021-24696 HIGH 8.8 UPGRADE The Simple Download Monitor WordPress plugin before 3.9.9 does not enforce nonce checks, which could allow att
CVE-2021-24695 HIGH 7.5 UPGRADE The Simple Download Monitor WordPress plugin before 3.9.6 saves logs in a predictable location, and does not h
CVE-2021-24694 MEDIUM 5.4 UPGRADE The Simple Download Monitor WordPress plugin before 3.9.11 could allow users with a role as low as Contributor

References

← Back to latest CVEs