Vulnerability-Lookup

CVE-2026-77129 (GCVE-0-2026-77129)

Vulnerability from cvelistv5 – Published: 2026-08-25 09:00 – Updated: 2026-08-25 14:07

Title

Server-Side Template Injection in extension "Event management and registration" (sf_event_mgt)

Summary

The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects. Exploitation of this issue requires an authenticated backend account with edit access to the event registration plugin or backend module.

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 14:07 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine

Assigner

TYPO3 mitre root

References

1 reference

URL	Tags
https://typo3.org/security/advisory/typo3-ext-sa-…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
TYPO3	Extension "Event management and registration"	Affected: 9.0.0 , < 9.0.3 (semver) Affected: 8.0.0 , < 8.6.2 (semver) Affected: 7.0.0 , < 7.9.3 (semver) Affected: 6.0.0 , < 6.7.2 (semver) Affected: 0 , < 5.9.3 (semver)	guessed

Date Public

2026-08-25 09:00

Credits

Torben Hansen

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-77129

Vulnerability from fkie_nvd - Published: 2026-08-25 09:17 - Updated: 2026-08-25 14:16

Severity

7.7 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	f4fb688c-4412-4426-b4b8-421ecf27b14a	https://typo3.org/security/advisory/typo3-ext-sa-2026-023

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "collectionURL": "https://packagist.org/",
          "defaultStatus": "unaffected",
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    }
  ],
  "id": "CVE-2026-77129",
  "lastModified": "2026-08-25T14:16:54.173",
  "metrics": {
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          "Recovery": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
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}

GHSA-J8G2-Q9PF-89W3

Vulnerability from github – Published: 2026-08-25 09:30 – Updated: 2026-08-25 09:30

Details

Severity

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-77129"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1336"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T09:17:33Z",
    "severity": "HIGH"
  },
  "details": "The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects. Exploitation of this issue requires an authenticated backend account with edit access to the event registration plugin or backend module.",
  "id": "GHSA-j8g2-q9pf-89w3",
  "modified": "2026-08-25T09:30:39Z",
  "published": "2026-08-25T09:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77129"
    },
    {
      "type": "WEB",
      "url": "https://typo3.org/security/advisory/typo3-ext-sa-2026-023"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-77129 (GCVE-0-2026-77129)

FKIE_CVE-2026-77129

GHSA-J8G2-Q9PF-89W3

Tags

Sightings

Nomenclature