CWE-394
AllowedUnexpected Status Code or Return Value
Abstraction: Base · Status: Draft
The product does not properly check when a function or operation returns a value that is legitimate for the function, but is not expected by the product.
26 vulnerabilities reference this CWE, most recent first.
CVE-2022-24880 (GCVE-0-2022-24880)
Vulnerability from cvelistv5 – Published: 2022-04-25 22:10 – Updated: 2025-04-23 18:32| URL | Tags |
|---|---|
| https://github.com/Tethik/flask-session-captcha/s… | x_refsource_CONFIRM |
| https://github.com/Tethik/flask-session-captcha/pull/27 | x_refsource_MISC |
| https://github.com/Tethik/flask-session-captcha/c… | x_refsource_MISC |
| https://github.com/Tethik/flask-session-captcha/r… | x_refsource_MISC |
| Vendor | Product | Version | |
|---|---|---|---|
| Tethik | flask-session-captcha |
Affected:
< 1.2.1
|
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CVE-2019-20924 (GCVE-0-2019-20924)
Vulnerability from cvelistv5 – Published: 2020-11-23 15:30 – Updated: 2024-09-16 20:21- CWE-394 - Unexpected Status Code or Return Value
| URL | Tags |
|---|---|
| https://jira.mongodb.org/browse/SERVER-44377 | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc. | MongoDB Server |
Affected:
4.2 , < 4.2.2
(custom)
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CVE-2019-0066 (GCVE-0-2019-0066)
Vulnerability from cvelistv5 – Published: 2019-10-09 19:26 – Updated: 2024-09-16 22:15- CWE-394 - Unexpected Status Code or Return Value
| URL | Tags |
|---|---|
| https://kb.juniper.net/JSA10965 | x_refsource_MISC |
| https://www.juniper.net/documentation/en_US/junos… | x_refsource_MISC |
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
15.1 , < 15.1F6-S12, 15.1R7-S2
(custom)
Affected: 16.1 , < 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S2 (custom) Affected: 16.2 , < 16.2R2-S7 (custom) Affected: 17.1 , < 17.1R2-S9, 17.1R3 (custom) Affected: 17.2 , < 17.2R1-S7, 17.2R2-S6, 17.2R3 (custom) Affected: 17.3 , < 17.3R2-S4, 17.3R3 (custom) Affected: 15.1X53 , < 15.1X53-D68, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590 (custom) |
|
| Juniper Networks | Junos OS |
Affected:
15.1X49 , < 15.1X49-D150
(custom)
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CVE-2018-20802 (GCVE-0-2018-20802)
Vulnerability from cvelistv5 – Published: 2020-11-23 15:15 – Updated: 2024-09-17 02:26- CWE-394 - Unexpected Status Code or Return Value
| URL | Tags |
|---|---|
| https://jira.mongodb.org/browse/SERVER-36993 | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc. | MongoDB Server |
Affected:
3.6 , < 3.6.9
(custom)
Affected: 4.0 , < 4.0.3 (custom) |
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GHSA-5PQQ-993M-XPC4
Vulnerability from github – Published: 2025-10-30 18:31 – Updated: 2025-11-10 15:31Lack of Graceful Error Handling - HTTP 5xx ErrorThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .
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GHSA-6XGV-XQ79-GP8C
Vulnerability from github – Published: 2022-05-24 17:34 – Updated: 2024-01-23 15:30A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries which trigger an invariant in the IndexBoundsBuilder. This issue affects: MongoDB Inc. MongoDB Server v4.2 versions prior to 4.2.2.
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GHSA-7FV4-25H2-46HC
Vulnerability from github – Published: 2023-07-13 12:30 – Updated: 2024-04-04 06:07Server information leak of configuration data when an error is generated in response to a specially crafted message.
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GHSA-7R87-CJ48-WJ45
Vulnerability from github – Published: 2022-04-26 21:19 – Updated: 2024-09-20 21:03Impact
flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session.
The captcha.validate() function would return None if passed no value (e.g. by submitting a request with an empty form).
If implementing users were checking the return value to be False, the captcha verification check could be bypassed.
Sample vulnerable code:
if captcha.validate() == False:
... # abort
else:
... # do stuff
Patches
A new version (1.2.1) is available that fixes the issue.
Workarounds
Users can workaround the issue by not explicitly checking that the value is False.
Checking the return value less explicitly should still work.
if not captcha.validate():
... # abort
else:
... # do stuff
if captcha.validate():
... # do stuff
else:
... # abort
References
https://github.com/Tethik/flask-session-captcha/pull/27
For more information
If you have any questions or comments about this advisory: * Open an issue in the github repo
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GHSA-G6MR-MVF4-4WVJ
Vulnerability from github – Published: 2022-05-24 17:34 – Updated: 2024-01-23 15:30A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries with compound indexes affecting QueryPlanner. This issue affects: MongoDB Inc. MongoDB Server v3.6 versions prior to 3.6.9, v4.0 versions prior to 4.0.3.
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"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-G88Q-58F2-QH8W
Vulnerability from github – Published: 2025-10-30 18:31 – Updated: 2025-11-10 15:31Systemic Internal Server Errors - HTTP 500 ResponseThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .
{
"affected": [],
"aliases": [
"CVE-2025-12515"
],
"database_specific": {
"cwe_ids": [
"CWE-394"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-30T16:15:34Z",
"severity": "CRITICAL"
},
"details": "Systemic Internal Server Errors - HTTP 500 ResponseThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .",
"id": "GHSA-g88q-58f2-qh8w",
"modified": "2025-11-10T15:31:03Z",
"published": "2025-10-30T18:31:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12515"
},
{
"type": "WEB",
"url": "https://azure-access.com/security-advisories"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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"
}
]
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.