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Fencer Vulns
critical 9.8

CVE-2019-16885 json

In OkayCMS through 2.3.4, an unauthenticated attacker can achieve remote code execution by injecting a malicious PHP object via a crafted c…

published 2019-12-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7386

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.6%
EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

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.

Exploit prediction

4.60% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • ait.ac.at https://www.ait.ac.at/ait-sa-20191129-01-unauthenticated-remote-code-execution-okaycms referenced PoC, tagged "exploit" by a source, unverified
  • seclists.org http://seclists.org/fulldisclosure/2019/Dec/15 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/155583/OkayCMS-2.3.4-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.