Open Redirect in Pylons Webob
CVE-2024-42353
WebOb provides objects for HTTP requests and responses. When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. `urlparse` however treats a `//` at the start of a string as a URI without a scheme, and then treats the next part as the hostname. `urljoin` will then use that hostname from the second part as the hostname replacing the original one from the request. This vulnerability is patched in WebOb version 1.8.8.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Pylons Webob — versions <= 1.8.7
- Pylonsproject Webob
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Pylons/webob/security/advisories/GHSA-mg3v-6m49-jhp3 (Exploit, Vendor Advisory)
- github.com/Pylons/webob/commit/f689bcf4f0a1f64f1735b1d5069aef5be6974b5b (Patch)
Frequently asked questions
- What is CVE-2024-42353?
- CVE-2024-42353 is a medium-severity vulnerability in Pylons Webob, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2024-08-14.
- How severe is CVE-2024-42353?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2024-42353 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.