CVE-2023-5556 json
Cross-site Scripting (XSS) - Reflected in structurizr/onpremises
published 2023-10-12 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57856
- cvss
- 5.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
Cross-site Scripting (XSS) - Reflected in GitHub repository structurizr/onpremises prior to 3194.
Patch / fix
- structurizr structurizr/onpremises 3194
- structurizr on-premises_installation 3194
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.27% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Structurizr on-premises - Cross Site Scripting nuclei detection template
- huntr.dev https://huntr.dev/bounties/a3ee0f98-6898-41ae-b1bd-242a03a73d1b referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- structurizr structurizr/onpremises
- structurizr on-premises_installation
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/structurizr/onpremises/commit/6cff4f792b010dfb1ff6a0b4ae1c6e398f8f8a18
patch
-
huntr.dev
/bounties/a3ee0f98-6898-41ae-b1bd-242a03a73d1b
exploit, patch, third-party-advisory
Sources
- CVE List CVE-2023-5556
- NVD CVE-2023-5556
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.