CVE-2021-32723

MEDIUM
Published Jun 28, 20215y ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Jun 28, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

Prism is a syntax highlighting library. Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS). When Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. This problem has been fixed in Prism v1.24. As a workaround, do not use ASCIIDoc or ERB to highlight untrusted text. Other languages are not affected and can be used to highlight untrusted text.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 2

VendorProductVersionRange
prismjsprism* <1.24.0
oracleapplication_express* <21.1.4

References 4

  • github.com https://github.com/PrismJS/prism/pull/2688
    PatchThird Party Advisory
  • github.com https://github.com/PrismJS/prism/pull/2774
    PatchThird Party Advisory
  • github.com https://github.com/PrismJS/prism/security/advisories/GHSA-gj77-59wh-66hg
    Third Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpujan2022.html
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/PrismJS/prism/pull/2688
    PatchThird Party Advisory
  • github.com https://github.com/PrismJS/prism/pull/2774
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpujan2022.html
    PatchThird Party Advisory