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CVE-2019-16885: In OkayCMS through 2.3.4, an unauthenticated attacker can achieve remote code execution by injecting a malicio

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This week
CRITICAL 9.8REMOTEUPGRADE

CVE-2019-16885 is a critical-severity flaw (CVSS 9.8) affecting okaycms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In OkayCMS through 2.3.4, an unauthenticated attacker can achieve remote code execution by injecting a malicious PHP object via a crafted cookie. This could happen at two places: first in view/ProductsView.php using the cookie price_filter, and second in api/Comparison.php via the cookie comparison.

Why this priority

  • Critical severity
  • EPSS top 8%: very likely to be exploited
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance4.6% (top 8%)
CISA exploited listNo
WeaknessCWE-94
Published2019-12-03
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: okay-cms

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

Am I affected?

Timeline

okay-cms okaycms UPGRADE
Affected: <= 2.3.4
Fixed in: newer than 2.3.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy okaycms || rpm -q okaycms || okaycms --version
2. UPGRADE to newer than 2.3.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade okaycms
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade okaycms
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-2019-16885?

okaycms: upgrade to newer than 2.3.4. Exact commands for each OS are on this page.

Is CVE-2019-16885 being exploited?

CVE-2019-16885 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-2019-16885 affect?

CVE-2019-16885 affects okaycms. Severity is critical (CVSS 9.8). In OkayCMS through 2.3.4, an unauthenticated attacker can achieve remote code execution by injecting a malicious PHP object via a crafted cookie. This could happen at two places: first in view/ProductsView.php using the cookie price_filter,

How urgent is CVE-2019-16885?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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