SSRF in Johannschopplich Nuxt-Api-Party
CVE-2023-49799
`nuxt-api-party` is an open source module to proxy API requests. nuxt-api-party attempts to check if the user has passed an absolute URL to prevent the aforementioned attack. This has been recently changed to use the regular expression `^https?://`, however this regular expression can be bypassed by an absolute URL with leading whitespace. For example `\nhttps://whatever.com` which has a leading newline. According to the fetch specification, before a fetch is made the URL is normalized. "To normalize a byte sequence potentialValue, remove any leading and trailing HTTP whitespace bytes from potentialValue.". This means the final request will be normalized to `https://whatever.com` bypassing the check and nuxt-api-party will send a request outside of the whitelist. This could allow us to leak credentials or perform Server-Side Request Forgery (SSRF). This vulnerability has been addressed in version 0.22.1. Users are advised to upgrade. Users unable to upgrade should revert to the previous method of detecting absolute URLs.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Johannschopplich Nuxt-Api-Party — versions < 0.22.1
- Johannschopplich Nuxt API Party
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/johannschopplich/nuxt-api-party/security/advisories/GHSA-3wfp-253j-5… (Exploit, Mitigation, Vendor Advisory)
- fetch.spec.whatwg.org/ (Not Applicable)
- fetch.spec.whatwg.org/ (Not Applicable)
- github.com/johannschopplich/nuxt-api-party/blob/777462e1e3af1d9f8938aa33f230cd8… (Issue Tracking)
- infra.spec.whatwg.org/ (Not Applicable)
Frequently asked questions
- What is CVE-2023-49799?
- CVE-2023-49799 is a high-severity vulnerability in Johannschopplich Nuxt-Api-Party, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2023-12-09.
- How severe is CVE-2023-49799?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-49799 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.