CVE-2023-4136
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Crafter Engine
- 7.4HighCVSS base score
- 1.4%Exploitation in 30 daysEPSS · top 27% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CrafterCMS Engine on Windows, MacOS, Linux, x86, ARM, 64 bit allows Reflected XSS.This issue affects CrafterCMS: from 4.0.0 through 4.0.2, from 3.1.0 through 3.1.27.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Nuclei template for it.
Show the exploits1
Nuclei templates1 template
- CrafterCMS Engine - Cross-Site Scripting (Nuclei template) (opens in a new tab)
http/cves/2023/CVE-2023-4136.yamlSeverity medium
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By crafter
Published
- 19 months later
· 19 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| crafterCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.4% · top 27% of all CVEs (10 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
- affected 4.0.0 – ≤ 4.0.2
- affected 3.1.0 – ≤ 3.1.27
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.craftercms:crafter-engineGHSA-jfm4-3vv3-fm4v (opens in a new tab)
What to do
Workaround: * Add a WAF to inspect and filter these types of attacks * Disable external access to these APIs if not in active use by the rendering application
References
3
- https://docs.craftercms.org/en/4.0/security/advisory.html#cv-2023080301 (opens in a new tab)x_transferred
- http://seclists.org/fulldisclosure/2023/Aug/30 (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/174304/CrafterCMS-4.0.2-Cross-Site-Scripting.html (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-54018 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jfm4-3vv3-fm4v (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-4136)Record last updated .