XSS in Crowcpp Crow
CVE-2021-23824
This affects the package Crow before 0.3+4. When using attributes without quotes in the template, an attacker can manipulate the input to introduce additional attributes, potentially executing code. This may lead to a Cross-site Scripting (XSS) vulnerability, assuming an attacker can influence the value entered into the template. If the template is used to render user-generated content, this vulnerability may escalate to a persistent XSS vulnerability.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Crowcpp Crow
- Crow — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/CrowCpp/Crow/pull/317 (Patch, Third Party Advisory, Issue Tracking)
- github.com/CrowCpp/Crow/releases/tag/v0.3+4 (Third Party Advisory, Release Notes)
- snyk.io/vuln/SNYK-UNMANAGED-CROW-2336164 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-23824?
- CVE-2021-23824 is a medium-severity vulnerability in Crowcpp Crow, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2022-01-13.
- How severe is CVE-2021-23824?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-23824 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.