CWE-203
AllowedObservable Discrepancy
Abstraction: Base · Status: Incomplete
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
835 vulnerabilities reference this CWE, most recent first.
GHSA-FWQR-QX2M-VQXQ
Vulnerability from github – Published: 2022-02-15 00:03 – Updated: 2026-07-14 12:31The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-channel attacks as a result of cache access patterns. NOTE: this issue exists because of an incomplete fix for CVE-2019-9495.
{
"affected": [],
"aliases": [
"CVE-2022-23304"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-17T02:15:00Z",
"severity": "CRITICAL"
},
"details": "The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-channel attacks as a result of cache access patterns. NOTE: this issue exists because of an incomplete fix for CVE-2019-9495.",
"id": "GHSA-fwqr-qx2m-vqxq",
"modified": "2026-07-14T12:31:06Z",
"published": "2022-02-15T00:03:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23304"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-585531.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/04/msg00019.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPDHU5MV464CZBPX7N2SNMUYP6DFIBZL"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YPDHU5MV464CZBPX7N2SNMUYP6DFIBZL"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202309-16"
},
{
"type": "WEB",
"url": "https://w1.fi/security/2022-1"
}
],
"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:H",
"type": "CVSS_V3"
}
]
}
GHSA-FWV7-32J3-896W
Vulnerability from github – Published: 2021-12-22 00:00 – Updated: 2021-12-28 00:01Dalmark Systems Systeam 2.22.8 build 1724 is vulnerable to User enumeration. The Systeam application is an ERP system that uses a mixed architecture based on SaaS tenant and user management, and on-premise database and web application counterparts. This issue occurs during the identification of the correct tenant for a given user, where a difference in messages could allow an attacker to determine if the given user is valid or not, enabling a brute force attack with valid users.
{
"affected": [],
"aliases": [
"CVE-2021-44876"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-21T17:15:00Z",
"severity": "MODERATE"
},
"details": "Dalmark Systems Systeam 2.22.8 build 1724 is vulnerable to User enumeration. The Systeam application is an ERP system that uses a mixed architecture based on SaaS tenant and user management, and on-premise database and web application counterparts. This issue occurs during the identification of the correct tenant for a given user, where a difference in messages could allow an attacker to determine if the given user is valid or not, enabling a brute force attack with valid users.",
"id": "GHSA-fwv7-32j3-896w",
"modified": "2021-12-28T00:01:14Z",
"published": "2021-12-22T00:00:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-44876"
},
{
"type": "WEB",
"url": "https://www.systeam.com.br/cve/userenum-1-en.txt"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-FX2C-JQXX-QWCV
Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 18:31Side-channel information leakage in CSS in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
{
"affected": [],
"aliases": [
"CVE-2026-14085"
],
"database_specific": {
"cwe_ids": [
"CWE-1300",
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-30T23:17:20Z",
"severity": "MODERATE"
},
"details": "Side-channel information leakage in CSS in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)",
"id": "GHSA-fx2c-jqxx-qwcv",
"modified": "2026-07-01T18:31:38Z",
"published": "2026-07-01T00:34:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14085"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/513155863"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-G245-8P5F-GJMM
Vulnerability from github – Published: 2023-10-30 18:30 – Updated: 2023-11-06 18:30In Slice, there is a possible disclosure of installed applications due to side channel information disclosure. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
{
"affected": [],
"aliases": [
"CVE-2023-21298"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-30T17:15:47Z",
"severity": "HIGH"
},
"details": "In Slice, there is a possible disclosure of installed applications due to side channel information disclosure. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.",
"id": "GHSA-g245-8p5f-gjmm",
"modified": "2023-11-06T18:30:17Z",
"published": "2023-10-30T18:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-21298"
},
{
"type": "WEB",
"url": "https://source.android.com/docs/security/bulletin/android-14"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-G2HF-9HJX-2RXJ
Vulnerability from github – Published: 2024-03-19 12:30 – Updated: 2025-11-04 21:31NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.
{
"affected": [],
"aliases": [
"CVE-2023-5388"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-19T12:15:07Z",
"severity": "MODERATE"
},
"details": "NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. This vulnerability affects Firefox \u003c 124, Firefox ESR \u003c 115.9, and Thunderbird \u003c 115.9.",
"id": "GHSA-g2hf-9hjx-2rxj",
"modified": "2025-11-04T21:31:20Z",
"published": "2024-03-19T12:30:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5388"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1780432"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00010.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00022.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00028.html"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2024-12"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2024-13"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2024-14"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-G39F-Q9CX-H4C7
Vulnerability from github – Published: 2024-02-08 18:30 – Updated: 2024-02-15 06:31php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass authentication via a timing side channel.
{
"affected": [],
"aliases": [
"CVE-2024-25191"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-08T17:15:11Z",
"severity": "CRITICAL"
},
"details": "php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass authentication via a timing side channel.",
"id": "GHSA-g39f-q9cx-h4c7",
"modified": "2024-02-15T06:31:34Z",
"published": "2024-02-08T18:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25191"
},
{
"type": "WEB",
"url": "https://github.com/P3ngu1nW/CVE_Request/blob/main/cdoco%3Aphp-jwt.md"
}
],
"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:H",
"type": "CVSS_V3"
}
]
}
GHSA-G4CR-7M3R-2VRR
Vulnerability from github – Published: 2026-05-10 09:31 – Updated: 2026-05-11 15:32A vulnerability was found in Industrial Application Software IAS Canias ERP 8.03. The impacted element is the function doAction of the component Login RMI Interface. Performing a manipulation results in observable response discrepancy. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitability is regarded as difficult. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
{
"affected": [],
"aliases": [
"CVE-2026-8242"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-10T09:16:32Z",
"severity": "LOW"
},
"details": "A vulnerability was found in Industrial Application Software IAS Canias ERP 8.03. The impacted element is the function doAction of the component Login RMI Interface. Performing a manipulation results in observable response discrepancy. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitability is regarded as difficult. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.",
"id": "GHSA-g4cr-7m3r-2vrr",
"modified": "2026-05-11T15:32:10Z",
"published": "2026-05-10T09:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8242"
},
{
"type": "WEB",
"url": "https://gist.github.com/0xb1lal/85422a63c10a001c75a22365457de624"
},
{
"type": "WEB",
"url": "https://hawktrace.com/blog/caniaserp"
},
{
"type": "WEB",
"url": "https://vuldb.com/submit/808295"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/362458"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/362458/cti"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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"
}
]
}
GHSA-G4VP-4GQR-7V8C
Vulnerability from github – Published: 2025-08-19 21:30 – Updated: 2025-08-20 19:06Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.5, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.15 and 7.4 GA through update 92 allows any authenticated remote user to view other calendars by allowing them to enumerate the names of other users, given an attacker the possibility to send phishing to these users.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.liferay.portal:release.portal.bom"
},
"ranges": [
{
"events": [
{
"introduced": "7.4.0-ga1"
},
{
"last_affected": "7.4.3.132-ga132"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-43743"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": true,
"github_reviewed_at": "2025-08-20T19:06:54Z",
"nvd_published_at": "2025-08-19T20:15:31Z",
"severity": "MODERATE"
},
"details": "Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.5, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.15 and 7.4 GA through update 92 allows any authenticated remote user to view other calendars by allowing them to enumerate the names of other users, given an attacker the possibility to send phishing to these users.",
"id": "GHSA-g4vp-4gqr-7v8c",
"modified": "2025-08-20T19:06:54Z",
"published": "2025-08-19T21:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-43743"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/02528147664475cd9f7205cd8bc05dfd43832201"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/144e4a276e456c4b7a0831ff038241f82a9181db"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/1513ed29f830c9119ee6be623ae783e545da4845"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/1e368205c710403e76749e38127419780acdda9d"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/7d6e1bccb62a41e944e0459d2c4b1eb9fdb31b8e"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/9a88f7fa98f9fc11a9eab444a256204cccc82b77"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/9aba859a6956786bcd8ce434ef063eed01b5ec6e"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/bd89933cc9022a98fc34b562ce3573a58f14cf38"
},
{
"type": "WEB",
"url": "https://github.com/liferay/liferay-portal/commit/d999a8e1902e88fdd7a26758f137925d969a639d"
},
{
"type": "PACKAGE",
"url": "https://github.com/liferay/liferay-portal"
},
{
"type": "WEB",
"url": "https://liferay.atlassian.net/browse/LPE-18206"
},
{
"type": "WEB",
"url": "https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43743"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/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"
}
],
"summary": "Liferay Portal Enumeration Discrepancy in Calendars"
}
GHSA-G56C-H972-7RHP
Vulnerability from github – Published: 2022-05-13 01:08 – Updated: 2022-05-13 01:08Symantec SSL Visibility (SSLV) 3.8.4FC, 3.10 prior to 3.10.4.1, 3.11, and 3.12 prior to 3.12.2.1 are vulnerable to the Return of the Bleichenbacher Oracle Threat (ROBOT) attack. All affected SSLV versions act as weak oracles according the oracle classification used in the ROBOT research paper. A remote attacker, who has captured a pre-recorded SSL session inspected by SSLV, can establish multiple millions of crafted SSL connections to the target and obtain the session keys required to decrypt the pre-recorded SSL session.
{
"affected": [],
"aliases": [
"CVE-2017-15533"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-05-17T13:29:00Z",
"severity": "MODERATE"
},
"details": "Symantec SSL Visibility (SSLV) 3.8.4FC, 3.10 prior to 3.10.4.1, 3.11, and 3.12 prior to 3.12.2.1 are vulnerable to the Return of the Bleichenbacher Oracle Threat (ROBOT) attack. All affected SSLV versions act as weak oracles according the oracle classification used in the ROBOT research paper. A remote attacker, who has captured a pre-recorded SSL session inspected by SSLV, can establish multiple millions of crafted SSL connections to the target and obtain the session keys required to decrypt the pre-recorded SSL session.",
"id": "GHSA-g56c-h972-7rhp",
"modified": "2022-05-13T01:08:58Z",
"published": "2022-05-13T01:08:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-15533"
},
{
"type": "WEB",
"url": "https://www.symantec.com/security-center/network-protection-security-advisories/SA160"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104163"
}
],
"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-G58R-FCX4-MV8R
Vulnerability from github – Published: 2025-01-14 15:30 – Updated: 2025-01-14 15:30An observable response discrepancy vulnerability [CWE-204] in FortiClientEMS 7.4.0, 7.2.0 through 7.2.4, 7.0 all versions, and FortiSOAR 7.5.0, 7.4.0 through 7.4.4, 7.3.0 through 7.3.2, 7.2 all versions, 7.0 all versions, 6.4 all versions may allow an unauthenticated attacker to enumerate valid users via observing login request responses.
{
"affected": [],
"aliases": [
"CVE-2024-36510"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-204"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-14T14:15:30Z",
"severity": "MODERATE"
},
"details": "An observable response discrepancy vulnerability [CWE-204] in FortiClientEMS 7.4.0, 7.2.0 through 7.2.4, 7.0 all versions, and FortiSOAR 7.5.0, 7.4.0 through 7.4.4, 7.3.0 through 7.3.2, 7.2 all versions, 7.0 all versions, 6.4 all versions may allow an unauthenticated attacker to enumerate valid users via observing login request responses.",
"id": "GHSA-g58r-fcx4-mv8r",
"modified": "2025-01-14T15:30:53Z",
"published": "2025-01-14T15:30:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36510"
},
{
"type": "WEB",
"url": "https://fortiguard.fortinet.com/psirt/FG-IR-24-071"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-46
Strategy: Separation of Privilege
- Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Mitigation MIT-39
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
CAPEC-189: Black Box Reverse Engineering
An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.