CVE & CISA-KEV Catalog

CVE-2018-7753

CRITICALEPSS 81th pctl
9.8
CVSS v3
NVD

Description

An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized.

CWE-20Improper Input Validation

How to fix

Remediation Available
python-bleachDebian
Fixed in:2.1.3-1CVE-2018-7753
Fixed in:2.1.3-1CVE-2018-7753
Fixed in:2.1.3-1CVE-2018-7753
Fixed in:2.1.3-1CVE-2018-7753
python-bleachUbuntu
Fixed in:1.4.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:2.1.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:3.1.1-1ubuntu0.1~esm1USN-8077-1
python-bleach-docUbuntu
Fixed in:1.4.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:2.1.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:3.1.1-1ubuntu0.1~esm1USN-8077-1
python3-bleachUbuntu
Fixed in:1.4.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:2.1.2-1ubuntu0.1~esm1USN-8077-1
Fixed in:3.1.1-1ubuntu0.1~esm1USN-8077-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.23%probability of exploitation in 30 days
81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2024-3400Critical10.0100%KEV + Ransom-
CVE-2021-45105Medium5.9100%-Fix
CVE-2021-44228Critical10.0100%KEV + RansomFix
CVE-2021-21985Critical9.8100%KEV + RansomFix
CVE-2018-7600Critical9.8100%KEV + RansomFix
CVE-2020-3452High7.5100%KEVFix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.