CVE-2018-15877: The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via

Q: How do I fix CVE-2018-15877?

plainview activity monitor: upgrade to 20180826. Exact commands for each OS are on this page.

Q: Is CVE-2018-15877 being exploited?

CVE-2018-15877 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-2018-15877 affect?

CVE-2018-15877 affects plainview activity monitor. Severity is high (CVSS 8.8). The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via shell metacharacters in the ip parameter of a wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools request.

Q: How urgent is CVE-2018-15877?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

This week

HIGH 8.8UPGRADE

CVE-2018-15877 is a high-severity flaw (CVSS 8.8) affecting plainview activity monitor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via shell metacharacters in the ip parameter of a wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools request.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	77.0% (top 1%)
CISA exploited list	No
Weakness	CWE-78
Published	2018-08-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: plainview activity monitor project

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

Am I affected?

Timeline

2018-08-26 07:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

plainview activity monitor project plainview activity monitor UPGRADE

Affected: < 20180826

Fixed in: 20180826

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy plainview-activity-monitor || rpm -q plainview-activity-monitor || plainview-activity-monitor --version

2. UPGRADE to 20180826 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade plainview-activity-monitor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade plainview-activity-monitor

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WordPress Plugin Plainview Activity Monitor 20161228 - (Authenticated) Command Injection
Exploit-DB: WordPress Plugin Plainview Activity Monitor 20161228 - Remote Code Execution (RCE) (Authenticated) (2)
Metasploit: Wordpress Plainview Activity Monitor RCE

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-2018-15877?

plainview activity monitor: upgrade to 20180826. Exact commands for each OS are on this page.

Is CVE-2018-15877 being exploited?

CVE-2018-15877 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-2018-15877 affect?

CVE-2018-15877 affects plainview activity monitor. Severity is high (CVSS 8.8). The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via shell metacharacters in the ip parameter of a wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools request.

How urgent is CVE-2018-15877?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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