What’s Vulnerable › Vulnerabilities

CVE-2018-7753

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-07 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Mozilla Bleach: 2.1, 2.1.1, 2.1.2

References

• https://bugs.debian.org/892252
• https://github.com/mozilla/bleach/commit/c5df5789ec3471a31311f42c2d19fc2cf21b35ef
• https://github.com/mozilla/bleach/releases/tag/v2.1.3
• https://bugs.debian.org/892252
• https://github.com/mozilla/bleach/commit/c5df5789ec3471a31311f42c2d19fc2cf21b35ef
• https://github.com/mozilla/bleach/releases/tag/v2.1.3

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