CVE-2026-27508 (GCVE-0-2026-27508)

Vulnerability from cvelistv5 – Published: 2026-03-30 16:51 – Updated: 2026-07-28 01:48
VLAI
Title
Smoothwall Express < 3.1 Update 13 Reflected XSS in redirect.cgi via url Parameter
Summary
Smoothwall Express versions prior to 3.1 Update 13 contain a reflected cross-site scripting vulnerability in the /redirect.cgi endpoint due to improper sanitation of the url parameter. Attackers can craft malicious URLs with javascript: schemes that execute arbitrary JavaScript in victims' browsers when clicked through the unsanitized link.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 17:51 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Smoothwall Express Affected: 0 , < 3.1 Update 13 (custom)
    cpe:2.3:o:smoothwall:smoothwall_express:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Alex Williams from Pellera Technologies VulnCheck
Show details on NVD website
To clipboard 

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          "references": [
            {
              "tags": [
                "vendor-advisory",
                "patch"
              ],
              "url": "https://community.smoothwall.org/forum/viewtopic.php?t=45095"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/smoothwall-express-reflected-xss-in-redirect-cgi-via-url-parameter"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Smoothwall Express \u003c 3.1 Update 13 Reflected XSS in redirect.cgi via url Parameter",
          "x_generator": {
            "engine": "vulncheck"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-27508",
        "datePublished": "2026-03-30T16:51:50.165Z",
        "dateReserved": "2026-02-19T19:51:07.327Z",
        "dateUpdated": "2026-07-28T01:48:28.994Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.