CVE-2020-1757: red hat undertow Improper Input Validation
Vulnerability summary
CVE-2020-1757 is a high (CVSS 8.1) Improper Input Validation vulnerability in red hat undertow. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 75.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 7Timeline
- 21-04-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final, where the Servlet container causes servletPath to normalize incorrectly by truncating the path after semicolon which may lead to an application mapping resulting in the security bypass.
CVSS metrics
8 scores · 5 sources · 3 versions- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- NVDNIST8.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- OSV · MavenEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- NVDNIST8.1HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
1.62%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
+0.03 pp
From 1.58% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Affected systems
Redhat6 products
- jboss_data_grid7.0.0
- jboss_enterprise_application_platform7.0.0
- jboss_fuse6.0.0 | 7.0.0
- openshift_application_runtimesna
- single_sign-on7.0
Debian1 product
- undertow< 2.1.0-1
Io.undertow1 product
- undertow-core< 2.1.0
Red hat1 product
- undertowall undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1 | all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final
Ubuntu1 product
- undertowAll versions (No fix recorded)
5 vendors · 10 products
References
5 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1757X Refsource CONFIRMWEBIssue TrackingVendor Advisory
