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VulnerabilityPublished

CVE-2025-68455: craftcms cms · Unsafe Reflection

Affects craftcms cmsSource CVE Database V5

0

Not known to be exploited · CVSS 8.6 High : upgrade to 5.8.21 or 4.16.17 soon.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.9% chance of exploitation in 30 days – higher than 61% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.8.21, 4.16.17
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade craftcms cms to 5.8.21 or 4.16.17.

Affected software

ProductAffectedFixed in
craftcmscmsAffected
  • >=5.0.0-RC1 <5.8.21
Fixed in
  • 5.8.21
craftcmscmsAffected
  • >=4.0.0-RC1 <4.16.17
Fixed in
  • 4.16.17

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

  1. Immediately upgrade Craft CMS installations to versions 4.16.17 or 5.8.21 or later, which contain the security fix for this vulnerability.
  2. Enforce strict access controls and multi-factor authentication (MFA) for all administrator accounts to reduce the risk of credential compromise.
  3. Regularly audit and monitor administrator activities within the Craft Control Panel for unusual or unauthorized Behavior attachments or code changes.
  4. Implement network segmentation and limit administrative access to trusted IP addresses or VPNs to reduce exposure.
  5. Conduct security awareness training focused on phishing and credential security to protect administrator accounts.
  6. Review and restrict the use of Behaviors in the CMS, ensuring only trusted and necessary extensions are enabled.
  7. Employ runtime application self-protection (RASP) or web application firewalls (WAF) with custom rules to detect and block suspicious code execution patterns related to this vulnerability.
  8. Maintain regular backups and incident response plans to quickly recover from potential exploitation.

Description

CVE-2025-68455 is a high-severity vulnerability in Craft CMS versions 4.0.0-RC1 through 4.16.16 and 5.0.0-RC1 through 5.8.20, allowing authenticated administrators to execute remote code via maliciously crafted Behaviors. The flaw arises from unsafe reflection (CWE-470), where externally controlled input is used to select classes or code, enabling potential Remote Code Execution (RCE).

References

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