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    4 vulnerabilities by slimphp

    CVE-2026-48157 (GCVE-0-2026-48157)

    Vulnerability from nvd – Published: 2026-06-15 20:59 – Updated: 2026-06-16 12:21
    VLAI
    Title
    Slim has Reflected XSS in the HtmlErrorRenderer
    Summary
    Slim is a PHP micro framework that enables users to write simple web applications and APIs. In versions 4.4.0 through 4.15, if an application uses HttpException::setTitle() and/or setDescription() to include untrusted/request-derived data in the error title or description (e.g. "No products found matching '{$query}'."), an attacker could inject arbitrary HTML/JavaScript that executes in the victim's browser when they encounter an HTML error page generated by Slim. The vulnerability is present even with displayErrorDetails = false as the unescaped title and description are rendered on this error path. Built-in exceptions (HttpNotFoundException, HttpBadRequestException, etc.) ship plain-text defaults, so a vanilla Slim app with no user code is not exploitable. Only applications that feed untrusted data into setTitle() and/or setDescription() are affected. The issue has been fixed in 4.15.2. If developers are unable to immediately update their applications, they can work around this issue by avoiding passing untrusted/request-derived data into HttpException::setTitle() and setDescription() and using static, plain-text error copy instead. They should also register a custom error renderer (an ErrorRendererInterface implementation, or a subclass of HtmlErrorRenderer that escapes the title and description) for the HTML media type.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Vendor Product Version
    slimphp Slim Affected: >= 4.4.0, < 4.15.2
    Create a notification for this product.
    Show details on NVD website

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    CVE-2023-30536 (GCVE-0-2023-30536)

    Vulnerability from nvd – Published: 2023-04-17 21:17 – Updated: 2025-02-05 20:43
    VLAI
    Title
    Insecure header validation in slim/psr7
    Summary
    slim/psr7 is a PSR-7 implementation for use with Slim 4. In versions prior to 1.6.1 an attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. An attacker that is able to control the header names that are passed to Slilm-Psr7 would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests. The issue has been patched in version 1.6.1. There are no known workarounds to this issue. Users are advised to upgrade.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    Impacted products
    Vendor Product Version
    slimphp Slim-Psr7 Affected: < 1.6.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-48157 (GCVE-0-2026-48157)

    Vulnerability from cvelistv5 – Published: 2026-06-15 20:59 – Updated: 2026-06-16 12:21
    VLAI
    Title
    Slim has Reflected XSS in the HtmlErrorRenderer
    Summary
    Slim is a PHP micro framework that enables users to write simple web applications and APIs. In versions 4.4.0 through 4.15, if an application uses HttpException::setTitle() and/or setDescription() to include untrusted/request-derived data in the error title or description (e.g. "No products found matching '{$query}'."), an attacker could inject arbitrary HTML/JavaScript that executes in the victim's browser when they encounter an HTML error page generated by Slim. The vulnerability is present even with displayErrorDetails = false as the unescaped title and description are rendered on this error path. Built-in exceptions (HttpNotFoundException, HttpBadRequestException, etc.) ship plain-text defaults, so a vanilla Slim app with no user code is not exploitable. Only applications that feed untrusted data into setTitle() and/or setDescription() are affected. The issue has been fixed in 4.15.2. If developers are unable to immediately update their applications, they can work around this issue by avoiding passing untrusted/request-derived data into HttpException::setTitle() and setDescription() and using static, plain-text error copy instead. They should also register a custom error renderer (an ErrorRendererInterface implementation, or a subclass of HtmlErrorRenderer that escapes the title and description) for the HTML media type.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Vendor Product Version
    slimphp Slim Affected: >= 4.4.0, < 4.15.2
    Create a notification for this product.
    Show details on NVD website

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    CVE-2023-30536 (GCVE-0-2023-30536)

    Vulnerability from cvelistv5 – Published: 2023-04-17 21:17 – Updated: 2025-02-05 20:43
    VLAI
    Title
    Insecure header validation in slim/psr7
    Summary
    slim/psr7 is a PSR-7 implementation for use with Slim 4. In versions prior to 1.6.1 an attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. An attacker that is able to control the header names that are passed to Slilm-Psr7 would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests. The issue has been patched in version 1.6.1. There are no known workarounds to this issue. Users are advised to upgrade.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    Impacted products
    Vendor Product Version
    slimphp Slim-Psr7 Affected: < 1.6.1
    Create a notification for this product.
    Show details on NVD website

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          "descriptions": [
            {
              "lang": "en",
              "value": "slim/psr7 is a PSR-7 implementation for use with Slim 4. In versions prior to 1.6.1 an attacker could sneak in a newline (\\n) into both the header names and values. While the specification states that \\r\\n\\r\\n is used to terminate the header list, many servers in the wild will also accept \\n\\n. An attacker that is able to control the header names that are passed to Slilm-Psr7 would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service\u2019s web application firewall bans the application due to the receipt of malformed requests. The issue has been patched in version 1.6.1. There are no known workarounds to this issue. Users are advised to upgrade."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-436",
                  "description": "CWE-436: Interpretation Conflict",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2023-04-17T21:17:33.775Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/slimphp/Slim-Psr7/security/advisories/GHSA-q2qj-628g-vhfw",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/slimphp/Slim-Psr7/security/advisories/GHSA-q2qj-628g-vhfw"
            },
            {
              "name": "https://github.com/slimphp/Slim-Psr7/commit/ed1d553225dd190875d8814c47460daed4b550bb",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/slimphp/Slim-Psr7/commit/ed1d553225dd190875d8814c47460daed4b550bb"
            },
            {
              "name": "https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4"
            }
          ],
          "source": {
            "advisory": "GHSA-q2qj-628g-vhfw",
            "discovery": "UNKNOWN"
          },
          "title": "Insecure header validation in slim/psr7"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2023-30536",
        "datePublished": "2023-04-17T21:17:33.775Z",
        "dateReserved": "2023-04-12T15:19:33.766Z",
        "dateUpdated": "2025-02-05T20:43:03.553Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }