HAX CMS PHP allows users to manage their microsite universe with a PHP backend. Prior to version 11.0.0, the application does not sufficiently sanitize user input, allowing for the execution of arbitrary JavaScript code. The 'saveNode' and 'saveManifest' endpoints take user input and store it in the JSON schema for the site. This content is then rendered in the generated HAX site. Although the application does not allow users to supply a script tag, it does allow the use of other HTML tags to run JavaScript. Version 11.0.0 fixes the issue.
CVE-2025-49137
This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 49% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.5
- EG Score
- 8.5(medium)
- EPSS
- 14.1%
- KEV
- Not listed
Published
June 9, 2025
Last Modified
July 30, 2025
References (3)
- security-advisories@githubhttps://github.com/haxtheweb/haxcms-php/commit/0dd3e98fe2fadd0793b667d4af2aac230980e0f8
- security-advisories@githubhttps://github.com/haxtheweb/issues/security/advisories/GHSA-2vc4-3hx7-v7v7
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/haxtheweb/issues/security/advisories/GHSA-2vc4-3hx7-v7v7
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| elmsln/haxcms | 0.0.1 ... 0.9.0 (17 versions) | 11.0.0 | — |
Weakness Classification(3)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 49× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2025-49137?
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Dependency Blast Radius
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