Prototype Pollution in Express Xss Sanitizer Project
CVE-2022-21169
The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.
Vulnerability class: Prototype Pollution
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.010 (60.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% 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: 0.010 · change: +0.002
Affected products
- Express Xss Sanitizer Project
- Express-Xss-Sanitizer — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443 (Exploit, Third Party Advisory)
- github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4 (Exploit, Third Party Advisory, Issue Tracking)
- runkit.com/embed/w306l6zfm7tu (URL Repurposed, Patch, Third Party Advisory)
- github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-21169?
- CVE-2022-21169 is a high-severity vulnerability in Express Xss Sanitizer Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.3/10. Published 2022-09-26.
- How severe is CVE-2022-21169?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2022-21169 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.