CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
1913 vulnerabilities reference this CWE, most recent first.
GHSA-6G5P-C2F9-9435
Vulnerability from github – Published: 2025-08-21 06:30 – Updated: 2025-08-21 06:30A malicious client can bypass the client certificate trust check of an opc.https server when the server endpoint is configured to allow only secure communication.
{
"affected": [],
"aliases": [
"CVE-2025-7390"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-21T06:15:35Z",
"severity": "CRITICAL"
},
"details": "A malicious client can bypass the client certificate trust check of an opc.https server when the server endpoint is configured to allow only secure communication.",
"id": "GHSA-6g5p-c2f9-9435",
"modified": "2025-08-21T06:30:20Z",
"published": "2025-08-21T06:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-7390"
},
{
"type": "WEB",
"url": "https://industrial.softing.com/fileadmin/psirt/downloads/2025/CVE-2025-7390.html"
},
{
"type": "WEB",
"url": "https://industrial.softing.com/fileadmin/psirt/downloads/2025/CVE-2025-7390.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6GGQ-GV3V-V28C
Vulnerability from github – Published: 2022-05-24 22:28 – Updated: 2024-09-16 18:31Dell EMC Unisphere for PowerMax versions prior to 9.1.0.17, Dell EMC Unisphere for PowerMax Virtual Appliance versions prior to 9.1.0.17, and PowerMax OS Release 5978 contain an improper certificate validation vulnerability. An unauthenticated remote attacker may potentially exploit this vulnerability to carry out a man-in-the-middle attack by supplying a crafted certificate and intercepting the victim's traffic to view or modify a victim’s data in transit.
{
"affected": [],
"aliases": [
"CVE-2020-5367"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-23T20:15:00Z",
"severity": "MODERATE"
},
"details": "Dell EMC Unisphere for PowerMax versions prior to 9.1.0.17, Dell EMC Unisphere for PowerMax Virtual Appliance versions prior to 9.1.0.17, and PowerMax OS Release 5978 contain an improper certificate validation vulnerability. An unauthenticated remote attacker may potentially exploit this vulnerability to carry out a man-in-the-middle attack by supplying a crafted certificate and intercepting the victim\u0027s traffic to view or modify a victim\u2019s data in transit.",
"id": "GHSA-6ggq-gv3v-v28c",
"modified": "2024-09-16T18:31:17Z",
"published": "2022-05-24T22:28:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5367"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-uk/000153935/dsa-2020-065-dell-emc-unisphere-for-powermax-dell-emc-unisphere-for-powermax-virtual-appliance-and-dell-emc-powermax-embedded-management-update-for-multiple-vulnerabilities"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/security/en-us/details/544585/DSA-2020-065-Dell-EMC-Unisphere-for-PowerMax-Dell-EMC-Unisphere-for-PowerMax-Virtual-Appliance"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6H99-8764-6J4P
Vulnerability from github – Published: 2024-03-13 06:30 – Updated: 2024-08-05 15:30The Toyoko Inn official App for iOS versions prior to 1.13.0 and Toyoko Inn official App for Android versions prior 1.3.14 don't properly verify server certificates, which allows a man-in-the-middle attacker to spoof servers and obtain sensitive information via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2024-27440"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-13T06:15:52Z",
"severity": "MODERATE"
},
"details": "The Toyoko Inn official App for iOS versions prior to 1.13.0 and Toyoko Inn official App for Android versions prior 1.3.14 don\u0027t properly verify server certificates, which allows a man-in-the-middle attacker to spoof servers and obtain sensitive information via a crafted certificate.",
"id": "GHSA-6h99-8764-6j4p",
"modified": "2024-08-05T15:30:50Z",
"published": "2024-03-13T06:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27440"
},
{
"type": "WEB",
"url": "https://apps.apple.com/jp/app/%E3%83%9B%E3%83%86%E3%83%AB%E6%9D%B1%E6%A8%AAinn-%E6%9D%B1%E6%A8%AA%E3%82%A4%E3%83%B3-%E5%85%AC%E5%BC%8F%E3%82%A2%E3%83%97%E3%83%AA/id1439388270"
},
{
"type": "WEB",
"url": "https://jvn.jp/en/jp/JVN52919306"
},
{
"type": "WEB",
"url": "https://play.google.com/store/apps/details?id=com.toyoko_inn.toyokoandroid"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6HRM-JQP3-64CV
Vulnerability from github – Published: 2021-04-13 15:42 – Updated: 2023-01-26 22:35TweetStream 2.6.1 uses the library eventmachine in an insecure way that does not have TLS hostname validation. This allows an attacker to perform a man-in-the-middle attack.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "tweetstream"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.6.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-24393"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2021-03-29T22:54:38Z",
"nvd_published_at": "2021-02-19T23:15:00Z",
"severity": "MODERATE"
},
"details": "TweetStream 2.6.1 uses the library eventmachine in an insecure way that does not have TLS hostname validation. This allows an attacker to perform a man-in-the-middle attack.",
"id": "GHSA-6hrm-jqp3-64cv",
"modified": "2023-01-26T22:35:31Z",
"published": "2021-04-13T15:42:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-24393"
},
{
"type": "PACKAGE",
"url": "https://github.com/tweetstream/tweetstream"
},
{
"type": "ADVISORY",
"url": "https://securitylab.github.com/advisories/GHSL-2020-096-tweetstream-tweetstream"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Improper Certificate Validation in TweetStream"
}
GHSA-6J39-893G-Q8CF
Vulnerability from github – Published: 2025-02-05 03:32 – Updated: 2025-02-05 03:32A vulnerability in Veeam Updater component allows Man-in-the-Middle attackers to execute arbitrary code on the affected server. This issue occurs due to a failure to properly validate TLS certificate.
{
"affected": [],
"aliases": [
"CVE-2025-23114"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-05T02:15:28Z",
"severity": "CRITICAL"
},
"details": "A vulnerability in Veeam Updater component allows Man-in-the-Middle attackers to execute arbitrary code on the affected server. This issue occurs due to a failure to properly validate TLS certificate.",
"id": "GHSA-6j39-893g-q8cf",
"modified": "2025-02-05T03:32:13Z",
"published": "2025-02-05T03:32:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23114"
},
{
"type": "WEB",
"url": "https://www.veeam.com/kb4712"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6JMW-P67P-7Q5C
Vulnerability from github – Published: 2022-05-17 00:51 – Updated: 2022-05-17 00:51The D-Link NPAPI extension, as used on D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) and REV. B (with firmware through FW208WWb02) devices, participates in mydlink Cloud Services by establishing a TCP relay service for HTTP, even though a TCP relay service for HTTPS is also established.
{
"affected": [],
"aliases": [
"CVE-2017-14419"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-09-13T17:29:00Z",
"severity": "MODERATE"
},
"details": "The D-Link NPAPI extension, as used on D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) and REV. B (with firmware through FW208WWb02) devices, participates in mydlink Cloud Services by establishing a TCP relay service for HTTP, even though a TCP relay service for HTTPS is also established.",
"id": "GHSA-6jmw-p67p-7q5c",
"modified": "2022-05-17T00:51:52Z",
"published": "2022-05-17T00:51:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14419"
},
{
"type": "WEB",
"url": "https://pierrekim.github.io/blog/2017-09-08-dlink-850l-mydlink-cloud-0days-vulnerabilities.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6JVH-7FRH-6572
Vulnerability from github – Published: 2022-05-24 16:49 – Updated: 2024-04-04 01:12The Android App 'Tootdon for Mastodon' version 3.4.1 and earlier does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2019-5961"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-07-05T14:15:00Z",
"severity": "HIGH"
},
"details": "The Android App \u0027Tootdon for Mastodon\u0027 version 3.4.1 and earlier does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.",
"id": "GHSA-6jvh-7frh-6572",
"modified": "2024-04-04T01:12:03Z",
"published": "2022-05-24T16:49:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5961"
},
{
"type": "WEB",
"url": "https://jvn.jp/en/jp/JVN57806517/index.html"
},
{
"type": "WEB",
"url": "http://blog.mastodon-tootdon.com/entry/2019/05/20/204019"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6MV5-CH6P-7G97
Vulnerability from github – Published: 2025-11-05 18:31 – Updated: 2025-11-05 21:31Tonec Internet Download Manager 6.42.41.1 and earlier suffers from Missing SSL Certificate Validation, which allows attackers to bypass update protections.
{
"affected": [],
"aliases": [
"CVE-2025-56231"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-05T18:15:33Z",
"severity": "CRITICAL"
},
"details": "Tonec Internet Download Manager 6.42.41.1 and earlier suffers from Missing SSL Certificate Validation, which allows attackers to bypass update protections.",
"id": "GHSA-6mv5-ch6p-7g97",
"modified": "2025-11-05T21:31:01Z",
"published": "2025-11-05T18:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-56231"
},
{
"type": "WEB",
"url": "https://www.notion.so/CVE-2025-56231-2a04e9f2a40d80b184f4d02be58d3600"
},
{
"type": "WEB",
"url": "http://tonec.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6P29-JHC3-FMFM
Vulnerability from github – Published: 2022-05-14 03:44 – Updated: 2022-05-14 03:44MatrixSSL version 3.7.2 adopts a collision-prone OID comparison logic resulting in possible spoofing of OIDs (e.g. in ExtKeyUsage extension) on X.509 certificates.
{
"affected": [],
"aliases": [
"CVE-2017-1000417"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-01-22T23:29:00Z",
"severity": "MODERATE"
},
"details": "MatrixSSL version 3.7.2 adopts a collision-prone OID comparison logic resulting in possible spoofing of OIDs (e.g. in ExtKeyUsage extension) on X.509 certificates.",
"id": "GHSA-6p29-jhc3-fmfm",
"modified": "2022-05-14T03:44:57Z",
"published": "2022-05-14T03:44:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-1000417"
},
{
"type": "WEB",
"url": "https://github.com/matrixssl/matrixssl/blob/master/doc/CHANGES.md"
},
{
"type": "WEB",
"url": "https://www.ieee-security.org/TC/SP2017/papers/231.pdf"
},
{
"type": "WEB",
"url": "https://www.youtube.com/watch?v=FW--c_F_cY8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6P5V-6RVF-WF2M
Vulnerability from github – Published: 2022-05-17 02:48 – Updated: 2022-05-17 02:48Photopt for Android before 2.0.1 does not verify SSL certificates.
{
"affected": [],
"aliases": [
"CVE-2016-1198"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-04-21T20:59:00Z",
"severity": "MODERATE"
},
"details": "Photopt for Android before 2.0.1 does not verify SSL certificates.",
"id": "GHSA-6p5v-6rvf-wf2m",
"modified": "2022-05-17T02:48:18Z",
"published": "2022-05-17T02:48:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-1198"
},
{
"type": "WEB",
"url": "https://mypocket.ntt.com/photopt/info/info_001.html"
},
{
"type": "WEB",
"url": "http://jvn.jp/en/jp/JVN11815655/index.html"
},
{
"type": "WEB",
"url": "http://jvndb.jvn.jp/en/contents/2016/JVNDB-2016-000050.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.