UBUNTU-CVE-2021-32723 (CVE-2021-32723)

Vulnerability from osv_ubuntu – Published: 2021-06-28 20:15 – Updated: 2026-05-20 14:53 – Source website
VLAI
Details

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.

Severity
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-prismjs",
            "binary_version": "1.11.0+dfsg-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "node-prismjs",
        "purl": "pkg:deb/ubuntu/node-prismjs@1.11.0+dfsg-3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.11.0+dfsg-2",
        "1.11.0+dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-prismjs",
            "binary_version": "1.27.0+dfsg+~1.26.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "node-prismjs",
        "purl": "pkg:deb/ubuntu/node-prismjs@1.27.0+dfsg+~1.26.0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.23.0+dfsg-1",
        "1.25.0+dfsg-1",
        "1.27.0+dfsg+~1.26.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-prismjs",
            "binary_version": "1.29.0+dfsg+~1.26.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "node-prismjs",
        "purl": "pkg:deb/ubuntu/node-prismjs@1.29.0+dfsg+~1.26.0-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.29.0+dfsg+~1.26.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-prismjs",
            "binary_version": "1.30.0+dfsg+~1.26.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "node-prismjs",
        "purl": "pkg:deb/ubuntu/node-prismjs@1.30.0+dfsg+~1.26.5-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.29.0+dfsg+~1.26.0-1",
        "1.30.0+dfsg+~1.26.5-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-prismjs",
            "binary_version": "1.30.0+dfsg+~1.26.6-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "node-prismjs",
        "purl": "pkg:deb/ubuntu/node-prismjs@1.30.0+dfsg+~1.26.6-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.30.0+dfsg+~1.26.5-1",
        "1.30.0+dfsg+~1.26.5-2",
        "1.30.0+dfsg+~1.26.6-1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2021-32723",
  "modified": "2026-05-20T14:53:21Z",
  "published": "2021-06-28T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-32723"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/PrismJS/prism/security/advisories/GHSA-gj77-59wh-66hg"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/PrismJS/prism/pull/2688"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/PrismJS/prism/pull/2774"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-32723"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-32723"
  ]
}



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