Weakness (CWE)
CWE-94: Improper Control of Generation of Code
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
How to prevent it (7 mitigations)
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Architecture and Design
Refactor your program so that you do not have to dynamically generate code.
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Architecture and Design
Run your code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product.
Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection.
This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise.
Be careful to avoid CWE-243 and other weaknesses related to jails.
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
To reduce the likelihood of code injection, use stringent allowlists that limit which constructs are allowed. If you are dynamically constructing code that invokes a function, then verifying that the input is alphanumeric might be insufficient. An attacker might still be able to reference a dangerous function that you did not intend to allow, such as system(), exec(), or exit().
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Testing
Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
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Operation
Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
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Operation
Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
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Implementation
For Python programs, it is frequently encouraged to use the ast.literal_eval() function instead of eval, since it is intentionally designed to avoid executing code. However, an adversary could still cause excessive memory or stack consumption via deeply nested structures [REF-1372], so the python documentation discourages use of ast.literal_eval() on untrusted data [REF-1373].
Source: MITRE CWE-94
1,074 results · Clear filters · Feed
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Low 3.5
Scada-LTS new cross site scripting
A vulnerability was found in Scada-LTS 2.7.8.1. Affected is an unknown function of the file pointHierarchy/new/. Performing manipulation of the argument Title results in cross site scripting. The attack is possible to be carried out remotely. The exploit has …
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Low 3.5
Scada-LTS scheduled_events.shtm cross site scripting
A vulnerability has been found in Scada-LTS 2.7.8.1. This impacts an unknown function of the file scheduled_events.shtm. Such manipulation of the argument alias leads to cross site scripting. The attack can be executed remotely. The exploit has been disclosed…
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Low 2.4
Netis WF2419 Wireless Settings index.htm cross site scripting
A vulnerability was determined in Netis WF2419 1.2.29433. This vulnerability affects unknown code of the file /index.htm of the component Wireless Settings Page. This manipulation of the argument SSID with the input <img/src/onerror=prompt(8)> causes cross si…
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Low 3.5
Portabilis i-Diario Informações Adicionais /planos-de-ensino-por-disciplina cross site scripting
A vulnerability was found in Portabilis i-Diario up to 1.5.0. This affects an unknown function of the file /planos-de-ensino-por-disciplina/ of the component Informações Adicionais Page. Performing manipulation of the argument Parecer/Conteúdos/Objetivos resu…
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Low 3.5
Portabilis i-Diario Informações Adicionais /planos-de-ensino-por-areas-de-conhecimento cross site scripting
A vulnerability has been found in Portabilis i-Diario up to 1.5.0. The impacted element is an unknown function of the file /planos-de-ensino-por-areas-de-conhecimento/ of the component Informações Adicionais Page. Such manipulation of the argument Parecer/Con…
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Low 3.5
Portabilis i-Diario Informações Adicionais /planos-de-aulas-por-disciplina cross site scripting
A flaw has been found in Portabilis i-Diario up to 1.5.0. The affected element is an unknown function of the file /planos-de-aulas-por-disciplina/ of the component Informações Adicionais Page. This manipulation of the argument Parecer/Objeto de Conhecimento/H…
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Low 2.4
ZenCart CKEditor cross site scripting
A vulnerability was detected in ZenCart 2.1.0. Affected by this vulnerability is an unknown functionality of the component CKEditor. The manipulation leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the pub…
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Low 3.5
zhenfeng13 My-Blog Tag save cross site scripting
A weakness has been identified in zhenfeng13 My-Blog up to 1.0.0. This issue affects some unknown processing of the file /admin/tags/save of the component Tag Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The e…
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Low 3.5
ExpressGateway express-gateway REST Endpoint apps.js cross site scripting
A vulnerability has been found in ExpressGateway express-gateway up to 1.16.10. Affected is an unknown function in the library lib/rest/routes/apps.js of the component REST Endpoint. The manipulation leads to cross site scripting. It is possible to launch the…
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Low 3.5
ExpressGateway express-gateway REST Endpoint users.js cross site scripting
A flaw has been found in ExpressGateway express-gateway up to 1.16.10. This issue affects some unknown processing in the library lib/rest/routes/users.js of the component REST Endpoint. The manipulation leads to cross site scripting. The attack may be initiat…
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Low 3.5
D-Link DIR-818LW DHCP Reserved Address bsc_lan.php cross site scripting
A vulnerability has been found in D-Link DIR-818LW 1.04. This vulnerability affects unknown code of the file /bsc_lan.php of the component DHCP Reserved Address Handler. The manipulation of the argument Name leads to cross site scripting. The attack can be in…
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Low 3.5
givanz Vvveb Endpoint post cross site scripting
A vulnerability has been found in givanz Vvveb up to 1.0.5. This vulnerability affects unknown code of the file /vadmin123/index.php?module=content/post&type=post of the component Endpoint. The manipulation leads to cross site scripting. The attack can be ini…
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Low 3.5
givanz Vvveb edit.tpl cross site scripting
A vulnerability was identified in givanz Vvveb up to 1.0.5. This affects an unknown part of the file admin/template/content/edit.tpl. The manipulation of the argument slug leads to cross site scripting. It is possible to initiate the attack remotely. The expl…
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Low 2.4
Portabilis i-Diario Dicionário de Termos BNCC dicionario-de-termos-bncc cross site scripting
A vulnerability was identified in Portabilis i-Diario 1.6. Affected by this vulnerability is an unknown functionality of the file /dicionario-de-termos-bncc of the component Dicionário de Termos BNCC Page. The manipulation of the argument Planos de ensino lea…
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Low 2.4
Portabilis i-Diario History objetivos-de-aprendizagem-e-habilidades cross site scripting
A vulnerability was determined in Portabilis i-Diario up to 1.6. Affected is an unknown function of the file /objetivos-de-aprendizagem-e-habilidades of the component History Page. The manipulation of the argument código/objetivo habilidade leads to cross sit…
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Low 2.4
Portabilis i-Educar Editar educar_instituicao_cad.php cross site scripting
A vulnerability was found in Portabilis i-Educar up to 2.10. This issue affects some unknown processing of the file /intranet/educar_instituicao_cad.php of the component Editar Page. The manipulation of the argument neighborhood name leads to cross site scrip…
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Low 3.5
yangzongzhuan RuoYi edit cross site scripting
A vulnerability was found in yangzongzhuan RuoYi up to 4.8.1. Affected by this vulnerability is the function Edit of the file /system/notice/edit. The manipulation of the argument noticeTitle/noticeContent leads to cross site scripting. The attack can be laun…
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Low 2.4
JCG Link-net LW-N915R Wireless Basic Settings basic.asp cross site scripting
A vulnerability has been found in JCG Link-net LW-N915R 17s.20.001.908. Affected is an unknown function of the file /wireless/basic.asp of the component Wireless Basic Settings Page. The manipulation of the argument Network Name leads to cross site scripting.…
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Low 2.4
atjiu pybbs Admin Panel settings cross site scripting
A vulnerability, which was classified as problematic, was found in atjiu pybbs up to 6.0.0. This affects an unknown part of the file /api/settings of the component Admin Panel. The manipulation leads to cross site scripting. It is possible to initiate the att…
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Low 3.5
Portabilis i-Diario Informações adicionais planos-de-aula-por-areas-de-conhecimento cross site scripting
A vulnerability was found in Portabilis i-Diario up to 1.5.0 and classified as problematic. Affected by this issue is some unknown functionality of the file /planos-de-aula-por-areas-de-conhecimento/ of the component Informações adicionais. The manipulation o…
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Low 3.5
Portabilis i-Diario Registro das atividades registros-de-conteudos-por-disciplina cross site scripting
A security flaw has been discovered in Portabilis i-Diario up to 1.5.0. The affected element is an unknown function of the file /registros-de-conteudos-por-disciplina/ of the component Registro das atividades. The manipulation of the argument Registro de ativ…
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Low 3.5
Portabilis i-Diario Registro das atividades registros-de-conteudos-por-areas-de-conhecimento cross site scripting
A vulnerability was identified in Portabilis i-Diario up to 1.5.0. Impacted is an unknown function of the file /registros-de-conteudos-por-areas-de-conhecimento/ of the component Registro das atividades. The manipulation of the argument Registro de atividades…
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Low 3.5
Portabilis i-Educar educar_usuario_lst.php cross site scripting
A vulnerability, which was classified as problematic, has been found in Portabilis i-Educar up to 2.9. This issue affects some unknown processing of the file /intranet/educar_usuario_lst.php. The manipulation of the argument nm_pessoa/matricula/matricula_inte…
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Low 3.5
Portabilis i-Educar Cadastrar Vínculo funcionario_vinculo_cad.php cross site scripting
A vulnerability classified as problematic was found in Portabilis i-Educar up to 2.9. This vulnerability affects unknown code of the file /intranet/funcionario_vinculo_cad.php of the component Cadastrar Vínculo Page. The manipulation of the argument nome lead…
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Low 3.5
Datacom DM955 5GT 1200 Wireless Basic Settings cross site scripting
A vulnerability classified as problematic was found in Datacom DM955 5GT 1200 825.8010.00. Affected by this vulnerability is an unknown functionality of the component Wireless Basic Settings. The manipulation of the argument SSID leads to cross site scripting…
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Low 3.1
Protected Total WebShield Extension Block Page cross site scripting
A vulnerability was found in Protected Total WebShield Extension up to 3.2.0 on Chrome. It has been classified as problematic. This affects an unknown part of the component Block Page. The manipulation of the argument Category leads to cross site scripting. I…
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Low 2.4
macrozheng mall Add Product Page upload cross site scripting
A vulnerability has been found in macrozheng mall up to 1.0.3 and classified as problematic. Affected by this vulnerability is the function Upload of the file /minio/upload of the component Add Product Page. The manipulation of the argument File leads to cros…
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Low 3.5
Scada-LTS Virtual Data Source Property data_source_edit.shtm cross site scripting
A vulnerability classified as problematic has been found in Scada-LTS up to 2.7.8.1. This affects an unknown part of the file /data_source_edit.shtm of the component Virtual Data Source Property Handler. The manipulation of the argument Name leads to cross si…
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Low 2.4
zhenfeng13 My-Blog Category save cross site scripting
A vulnerability was found in zhenfeng13 My-Blog up to 1.0.0. It has been classified as problematic. Affected is an unknown function of the file /admin/categories/save of the component Category Handler. The manipulation of the argument categoryName leads to cr…
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Low 3.4
An HTML injection vulnerability exists in WordPress plugin "Advanced Custom Fields" prior to 6.4.3. If this vulnerabili…
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Low 3.5
atjiu pybbs search cross site scripting
A vulnerability, which was classified as problematic, was found in atjiu pybbs up to 6.0.0. Affected is an unknown function of the file /search. The manipulation of the argument keyword leads to cross site scripting. It is possible to launch the attack remote…
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Low 2.4
atjiu pybbs list cross site scripting
A vulnerability, which was classified as problematic, has been found in atjiu pybbs up to 6.0.0. This issue affects some unknown processing of the file /admin/user/list. The manipulation of the argument Username leads to cross site scripting. The attack may b…
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Low 2.4
atjiu pybbs list cross site scripting
A vulnerability classified as problematic was found in atjiu pybbs up to 6.0.0. This vulnerability affects unknown code of the file /admin/sensitive_word/list. The manipulation of the argument word leads to cross site scripting. The attack can be initiated re…
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Low 2.4
atjiu pybbs list cross site scripting
A vulnerability classified as problematic has been found in atjiu pybbs up to 6.0.0. This affects an unknown part of the file /admin/tag/list. The manipulation of the argument Name leads to cross site scripting. It is possible to initiate the attack remotely.…
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Low 3.5
atjiu pybbs list cross site scripting
A vulnerability was found in atjiu pybbs up to 6.0.0. It has been rated as problematic. Affected by this issue is some unknown functionality of the file /admin/comment/list. The manipulation of the argument Username leads to cross site scripting. The attack m…
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Low 2.4CVE-2025-8550 Public exploit
atjiu pybbs list cross site scripting
A vulnerability was found in atjiu pybbs up to 6.0.0. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /admin/topic/list. The manipulation of the argument Username leads to cross site scripting. The a…
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Low 2.4
Portabilis i-Educar educar_motivo_afastamento_cad.php cross site scripting
A vulnerability, which was classified as problematic, has been found in Portabilis i-Educar 2.10. Affected by this issue is some unknown functionality of the file /intranet/educar_motivo_afastamento_cad.php. The manipulation of the argument nm_motivo leads to…
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Low 2.4
Portabilis i-Educar edit cross site scripting
A vulnerability classified as problematic was found in Portabilis i-Educar 2.10. Affected by this vulnerability is an unknown functionality of the file /module/RegraAvaliacao/edit. The manipulation of the argument nome leads to cross site scripting. The attac…
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Low 2.4
Portabilis i-Educar educar_raca_cad.php cross site scripting
A vulnerability classified as problematic has been found in Portabilis i-Educar 2.10. Affected is an unknown function of the file /intranet/educar_raca_cad.php. The manipulation of the argument nm_raca leads to cross site scripting. It is possible to launch t…
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Low 2.4
Portabilis i-Educar empresas_cad.php cross site scripting
A vulnerability was found in Portabilis i-Educar 2.10. It has been rated as problematic. This issue affects some unknown processing of the file /intranet/empresas_cad.php. The manipulation of the argument fantasia/razao_social leads to cross site scripting. T…