Common Weakness Enumeration
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.
884 vulnerabilities reference this CWE, most recent first.
GHSA-443M-F58X-JX9J
Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 00:34
VLAI
Details
Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2026-56327"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-30T23:17:30Z",
"severity": "MODERATE"
},
"details": "Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.",
"id": "GHSA-443m-f58x-jx9j",
"modified": "2026-07-01T00:34:13Z",
"published": "2026-07-01T00:34:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56327"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-oracle-via-public-invite-user-to-org-rpc"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/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"
}
]
}
GHSA-4544-6QCJ-9222
Vulnerability from github – Published: 2022-05-13 01:18 – Updated: 2022-05-13 01:18
VLAI
Details
Vesta CP version Prior to commit f6f6f9cfbbf2979e301956d1c6ab5c44386822c0 -- any release prior to 0.9.8-18 contains a CWE-208 / Information Exposure Through Timing Discrepancy vulnerability in Password reset code -- web/reset/index.php, line 51 that can result in Possible to determine password reset codes, attacker is able to change administrator password. This attack appear to be exploitable via Unauthenticated network connectivity. This vulnerability appears to have been fixed in After commit f6f6f9cfbbf2979e301956d1c6ab5c44386822c0 -- release version 0.9.8-19.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2018-1000884"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-12-20T21:29:00Z",
"severity": "CRITICAL"
},
"details": "Vesta CP version Prior to commit f6f6f9cfbbf2979e301956d1c6ab5c44386822c0 -- any release prior to 0.9.8-18 contains a CWE-208 / Information Exposure Through Timing Discrepancy vulnerability in Password reset code -- web/reset/index.php, line 51 that can result in Possible to determine password reset codes, attacker is able to change administrator password. This attack appear to be exploitable via Unauthenticated network connectivity. This vulnerability appears to have been fixed in After commit f6f6f9cfbbf2979e301956d1c6ab5c44386822c0 -- release version 0.9.8-19.",
"id": "GHSA-4544-6qcj-9222",
"modified": "2022-05-13T01:18:47Z",
"published": "2022-05-13T01:18:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000884"
},
{
"type": "WEB",
"url": "https://github.com/serghey-rodin/vesta/commit/5f68c1b634abec2d5a4f83156bfd223d3a792f77#diff-4d7863e8c24a5e6102073acc2fb0f227"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-466P-J3VQ-MWQ3
Vulnerability from github – Published: 2025-01-25 15:30 – Updated: 2025-01-25 15:30
VLAI
Details
IBM Control Center 6.2.1 and 6.3.1
could allow a remote attacker to enumerate usernames due to an observable discrepancy between login attempts.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-35114"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-204"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-25T14:15:29Z",
"severity": "MODERATE"
},
"details": "IBM Control Center 6.2.1 and 6.3.1 \n\n\n\n\n\ncould allow a remote attacker to enumerate usernames due to an observable discrepancy between login attempts.",
"id": "GHSA-466p-j3vq-mwq3",
"modified": "2025-01-25T15:30:31Z",
"published": "2025-01-25T15:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35114"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7174842"
}
],
"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"
}
]
}
GHSA-4679-HXQ5-W394
Vulnerability from github – Published: 2022-05-13 01:02 – Updated: 2022-05-13 01:02
VLAI
Details
A timing attack in SVG rendering in Google Chrome prior to 60.0.3112.78 for Linux, Windows, and Mac allowed a remote attacker to extract pixel values from a cross-origin page being iframe'd via a crafted HTML page.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2017-5107"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-27T05:29:00Z",
"severity": "MODERATE"
},
"details": "A timing attack in SVG rendering in Google Chrome prior to 60.0.3112.78 for Linux, Windows, and Mac allowed a remote attacker to extract pixel values from a cross-origin page being iframe\u0027d via a crafted HTML page.",
"id": "GHSA-4679-hxq5-w394",
"modified": "2022-05-13T01:02:39Z",
"published": "2022-05-13T01:02:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5107"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:1833"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2017/07/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/686253"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201709-15"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3926"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/99950"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-478Q-3PJ2-84WM
Vulnerability from github – Published: 2022-06-25 00:01 – Updated: 2022-07-02 00:00
VLAI
Details
A user enumeration vulnerability in MELAG FTP Server 2.2.0.4 allows an attacker to identify valid FTP usernames.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2021-41634"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-24T12:15:00Z",
"severity": "MODERATE"
},
"details": "A user enumeration vulnerability in MELAG FTP Server 2.2.0.4 allows an attacker to identify valid FTP usernames.",
"id": "GHSA-478q-3pj2-84wm",
"modified": "2022-07-02T00:00:23Z",
"published": "2022-06-25T00:01:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41634"
},
{
"type": "WEB",
"url": "https://www.securesystems.de/blog/advisory-and-exploitation-the-melag-ftp-server"
}
],
"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"
}
]
}
GHSA-48JW-3344-G954
Vulnerability from github – Published: 2022-05-24 16:54 – Updated: 2022-05-24 16:54
VLAI
Details
In CentOS-WebPanel.com (aka CWP) CentOS Web Panel 0.9.8.848, the Login process allows attackers to check whether a username is valid by comparing response times.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2019-13599"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-08-21T19:15:00Z",
"severity": "MODERATE"
},
"details": "In CentOS-WebPanel.com (aka CWP) CentOS Web Panel 0.9.8.848, the Login process allows attackers to check whether a username is valid by comparing response times.",
"id": "GHSA-48jw-3344-g954",
"modified": "2022-05-24T16:54:22Z",
"published": "2022-05-24T16:54:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13599"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/154164/CentOS-Control-Web-Panel-CWP-0.9.8.848-User-Enumeration.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/154164/CentOS-WebPanel.com-CentOS-Control-Web-Panel-CWP-0.9.8.848-User-Enumeration.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/154164/CentOS-WebPanel.com-Control-Web-Panel-CWP-0.9.8.848-User-Enumeration.html"
}
],
"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"
}
]
}
GHSA-4FQ5-58J6-9QPH
Vulnerability from github – Published: 2023-07-10 18:30 – Updated: 2026-06-01 15:30
VLAI
Details
Observable Response Discrepancy in the SICK ICR890-4 could allow a remote attacker to identify valid usernames for the FTP server from the response given during a failed login attempt.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2023-35698"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-204"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-10T16:15:52Z",
"severity": "MODERATE"
},
"details": "Observable Response Discrepancy in the SICK ICR890-4 could allow a remote attacker to identify valid usernames for the FTP server from the response given during a failed login\nattempt.",
"id": "GHSA-4fq5-58j6-9qph",
"modified": "2026-06-01T15:30:31Z",
"published": "2023-07-10T18:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-35698"
},
{
"type": "WEB",
"url": "https://sick.com/.well-known/csaf/white/2023/sca-2023-0006.json"
},
{
"type": "WEB",
"url": "https://sick.com/.well-known/csaf/white/2023/sca-2023-0006.pdf"
},
{
"type": "WEB",
"url": "https://sick.com/psirt"
}
],
"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"
}
]
}
GHSA-4GRF-X53V-R95X
Vulnerability from github – Published: 2024-05-03 18:30 – Updated: 2024-05-03 18:30
VLAI
Details
IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2021-20556"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-204"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T18:15:07Z",
"severity": "MODERATE"
},
"details": "IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.",
"id": "GHSA-4grf-x53v-r95x",
"modified": "2024-05-03T18:30:37Z",
"published": "2024-05-03T18:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20556"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/199181"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7149876"
}
],
"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"
}
]
}
GHSA-4H56-XMQ8-7HC9
Vulnerability from github – Published: 2026-02-08 00:30 – Updated: 2026-02-11 00:30
VLAI
Details
WeKan versions prior to 8.19 contain an information disclosure vulnerability in the attachments publication. Attachment metadata can be returned without properly scoping results to boards and cards accessible to the requesting user, potentially exposing attachment metadata to unauthorized users.
Severity
4.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2026-25562"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-07T22:16:01Z",
"severity": "MODERATE"
},
"details": "WeKan versions prior to 8.19 contain an information disclosure vulnerability in the attachments publication. Attachment metadata can be returned without properly scoping results to boards and cards accessible to the requesting user, potentially exposing attachment metadata to unauthorized users.",
"id": "GHSA-4h56-xmq8-7hc9",
"modified": "2026-02-11T00:30:14Z",
"published": "2026-02-08T00:30:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25562"
},
{
"type": "WEB",
"url": "https://github.com/wekan/wekan/commit/6dfa3beb2b6ab23438d0f4395b84bf0749eb4820"
},
{
"type": "WEB",
"url": "https://wekan.fi"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/wekan-attachments-publication-information-disclosure"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/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"
}
]
}
GHSA-4H9J-8G4Q-FCFQ
Vulnerability from github – Published: 2022-05-24 19:08 – Updated: 2022-12-26 03:30
VLAI
Details
An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.
Severity
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2020-36421"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-07-19T17:15:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.",
"id": "GHSA-4h9j-8g4q-fcfq",
"modified": "2022-12-26T03:30:21Z",
"published": "2022-05-24T19:08:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36421"
},
{
"type": "WEB",
"url": "https://github.com/ARMmbed/mbedtls/issues/3394"
},
{
"type": "WEB",
"url": "https://bugs.gentoo.org/730752"
},
{
"type": "WEB",
"url": "https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7"
},
{
"type": "WEB",
"url": "https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html"
}
],
"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
Architecture and Design
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
Implementation
- 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.