Assessment
Why it matters
EPSS is 0.2%; technical severity is CVSS 7.3.
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6, due to improper sanitation of user data, it allows an attacker to compose an URL, which will cause the target to execute arbitrary JavaScript code (XSS) on the target's machine when the target is viewing the PHP-FPM status page.
Who should care
- Teams operating PHP
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether PHP is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Vendor advisory from github.com
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:L/U:Amber
- CWE
- CWE-79
- Affected versions
- PHP PHP (Start Including 8.2.0, End Excluding 8.2.31 | Start Including 8.3.0, End Excluding 8.3.31 | Start Including 8.4.0, End Excluding 8.4.21 | Start Including 8.5.0, End Excluding 8.5.6)
- Fixed versions
- PHP PHP (Fixed from 8.2.31, 8.3.31, 8.4.21, 8.5.6)
- Published
- 10 May 2026
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
Signal timeline
- CVE published
- Latest EPSS score: 0.2%
- Signal calculated at 11