Search criteria
4 vulnerabilities found for express_xss_sanitizer by express_xss_sanitizer_project
CVE-2026-33979 (GCVE-0-2026-33979)
Vulnerability from nvd – Published: 2026-03-27 21:29 – Updated: 2026-03-31 14:29
VLAI?
Title
Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)
Summary
Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden.
Severity ?
8.2 (High)
CWE
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| AhmedAdelFahim | express-xss-sanitizer |
Affected:
< 2.0.2
|
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CVE-2022-21169 (GCVE-0-2022-21169)
Vulnerability from nvd – Published: 2022-09-26 05:05 – Updated: 2025-05-21 20:29
VLAI?
Title
Prototype Pollution
Summary
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.
Severity ?
CWE
- Prototype Pollution
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | express-xss-sanitizer |
Affected:
unspecified , < 1.1.3
(custom)
|
Date Public ?
2022-09-26 00:00
Credits
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CVE-2026-33979 (GCVE-0-2026-33979)
Vulnerability from cvelistv5 – Published: 2026-03-27 21:29 – Updated: 2026-03-31 14:29
VLAI?
Title
Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)
Summary
Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden.
Severity ?
8.2 (High)
CWE
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| AhmedAdelFahim | express-xss-sanitizer |
Affected:
< 2.0.2
|
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CVE-2022-21169 (GCVE-0-2022-21169)
Vulnerability from cvelistv5 – Published: 2022-09-26 05:05 – Updated: 2025-05-21 20:29
VLAI?
Title
Prototype Pollution
Summary
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.
Severity ?
CWE
- Prototype Pollution
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | express-xss-sanitizer |
Affected:
unspecified , < 1.1.3
(custom)
|
Date Public ?
2022-09-26 00:00
Credits
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