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geshi — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2025-2123

A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument default-styles/keywords-1/keywords-2/keywords-3/keywords-4/comments leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Products
geshi
Affected versions
1.0.8.11-2, 1.0.8.11-2.1, 1.0.8.11-2ubuntu1, 1.0.8.11-3, 1.0.9.1-1, 1.0.9.1-1build1
Fixed versions
Not specified
CVEs
CVE-2025-2123
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 01:31 UTC · Revision 1

Source evidence

UBUNTU-CVE-2025-2123

core-osv · Original source

Published 9 Mar 2025, 15:15 UTC

A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument default-styles/keywords-1/keywords-2/keywords-3/keywords-4/comments leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

osv:UBUNTU-CVE-2025-2123

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

geshi

Fixed versions: Not specified

Complete source record
{
  "id": "954e177b204a9cef661b3a712fb5b52dd5ea6bf737b0774b6c4fa6f8b87db4f1",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-2123",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2025-2123",
    "summary": "A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument default-styles/keywords-1/keywords-2/keywords-3/keywords-4/comments leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.",
    "evidence": "osv:UBUNTU-CVE-2025-2123",
    "products": [
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.8.11-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.0.8.11-2ubuntu1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.8.11-2.1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.8.11-3",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.9.1-1",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.9.1-1",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.9.1-1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.9.1-1build1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "geshi",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.9.1-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.0.9.1-1build1",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2025-2123",
      "aliases": [
        "UBUNTU-CVE-2025-2123"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=xenial",
            "ecosystem": "Ubuntu:16.04:LTS"
          },
          "versions": [
            "1.0.8.11-2",
            "1.0.8.11-2ubuntu1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.8.11-2ubuntu1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "1.0.8.11-2.1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.8.11-2.1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1.0.8.11-3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.8.11-3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1.0.9.1-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.9.1-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1.0.9.1-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.9.1-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "1.0.9.1-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.9.1-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "0"
                }
              ]
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          ],
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            "name": "geshi",
            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
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            "1.0.9.1-1build1"
          ],
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                "binary_version": "1.0.9.1-1build1"
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          }
        },
        {
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            "purl": "pkg:deb/ubuntu/geshi?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
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            "1.0.9.1-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-2123.json"
          },
          "ecosystem_specific": {
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              {
                "binary_name": "php-geshi",
                "binary_version": "1.0.9.1-1build1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:57:01.727843289Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-2123"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2025-2123",
        "https://www.cve.org/CVERecord?id=CVE-2025-2123",
        "https://github.com/GeSHi/geshi-1.0/issues/159#issue-2880408694",
        "https://vuldb.com/?ctiid.299036",
        "https://vuldb.com/?id.299036",
        "https://vuldb.com/?submit.507418"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-2123",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 356657,
  "published_at": "2025-03-09T15:15:00+00:00"
}