Vulnerability-Lookup

CVE-2026-73671 (GCVE-0-2026-73671)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:00 – Updated: 2026-08-14 16:52

Title

Saurus CMS Unauthenticated Open Redirect via logout url parameter

Summary

Saurus CMS Community Edition contains an unauthenticated open redirect vulnerability in the logout handling code in classes/port.inc.php, where the url parameter supplied via GET or POST is passed directly to the Location header without domain allowlist, scheme validation, or relative path enforcement. Attackers can craft a malicious logout URL containing an arbitrary external domain or javascript: URI scheme to redirect authenticated users to attacker-controlled phishing pages after session destruction, enabling credential theft and OAuth redirect abuse.

Severity

5.1 (Medium)


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

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:49 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/sauruscms/Saurus-CMS-Community…	product
https://github.com/DevVaibhav07/VULN-POC/blob/mai…	technical-description
https://www.vulncheck.com/advisories/saurus-cms-u…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Saurus	Saurus CMS Community Edition	Affected: 0 , ≤ d886e5b (custom) cpe:2.3:a:saurus:saurus_cms:::::community:::*

Date Public

2026-08-13 00:00

Credits

Vaibhav Kubade

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-73671

Vulnerability from fkie_nvd - Published: 2026-08-13 16:19 - Updated: 2026-08-31 20:38

Severity

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/DevVaibhav07/VULN-POC/blob/main/Saurus_OpenRedirect.md
	disclosure@vulncheck.com	https://github.com/sauruscms/Saurus-CMS-Community-Edition
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/saurus-cms-unauthenticated-open-redirect-via-logout-url-parameter
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/DevVaibhav07/VULN-POC/blob/main/Saurus_OpenRedirect.md

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-JJJG-67RC-QF87

Vulnerability from github – Published: 2026-08-13 18:31 – Updated: 2026-08-13 18:31

Details

Severity

6.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

5.1 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-73671"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T16:19:07Z",
    "severity": "MODERATE"
  },
  "details": "Saurus CMS Community Edition contains an unauthenticated open redirect vulnerability in the logout handling code in classes/port.inc.php, where the url parameter supplied via GET or POST is passed directly to the Location header without domain allowlist, scheme validation, or relative path enforcement. Attackers can craft a malicious logout URL containing an arbitrary external domain or javascript: URI scheme to redirect authenticated users to attacker-controlled phishing pages after session destruction, enabling credential theft and OAuth redirect abuse.",
  "id": "GHSA-jjjg-67rc-qf87",
  "modified": "2026-08-13T18:31:38Z",
  "published": "2026-08-13T18:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73671"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DevVaibhav07/VULN-POC/blob/main/Saurus_OpenRedirect.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sauruscms/Saurus-CMS-Community-Edition"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/saurus-cms-unauthenticated-open-redirect-via-logout-url-parameter"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-73671 (GCVE-0-2026-73671)

FKIE_CVE-2026-73671

GHSA-JJJG-67RC-QF87

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Nomenclature

Related by attack behaviour