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 3.5CVE-2025-7840 Public exploit
Campcodes Online Movie Theater Seat Reservation System Reserve Your Seat Page index.php cross site scripting
A vulnerability was found in Campcodes Online Movie Theater Seat Reservation System 1.0. It has been classified as problematic. This affects an unknown part of the file /index.php?page=reserve of the component Reserve Your Seat Page. The manipulation of the a…
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Low 2.4
PHPGurukul Apartment Visitors Management System HTTP POST Request create-pass.php cross site scripting
A vulnerability was found in PHPGurukul Apartment Visitors Management System 1.0. It has been classified as problematic. This affects an unknown part of the file /create-pass.php of the component HTTP POST Request Handler. The manipulation of the argument vis…
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Low 3.5
PHPGurukul Apartment Visitors Management System HTTP POST Request category.php cross site scripting
A vulnerability was found in PHPGurukul Apartment Visitors Management System 1.0 and classified as problematic. Affected by this issue is some unknown functionality of the file /category.php of the component HTTP POST Request Handler. The manipulation of the …
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Low 3.5
PHPGurukul Apartment Visitors Management System HTTP POST Request bwdates-reports.php cross site scripting
A vulnerability has been found in PHPGurukul Apartment Visitors Management System 1.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /bwdates-reports.php of the component HTTP POST Request Handler. The ma…
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Low 3.5
PHPGurukul Apartment Visitors Management System HTTP POST Request visitor-detail.php cross site scripting
A vulnerability, which was classified as problematic, was found in PHPGurukul Apartment Visitors Management System 1.0. Affected is an unknown function of the file /visitor-detail.php of the component HTTP POST Request Handler. The manipulation of the argumen…
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Low 2.4
PHPGurukul Apartment Visitors Management System HTTP POST Request manage-newvisitors.php cross site scripting
A vulnerability, which was classified as problematic, has been found in PHPGurukul Apartment Visitors Management System 1.0. This issue affects some unknown processing of the file /manage-newvisitors.php of the component HTTP POST Request Handler. The manipul…
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Low 3.5
descreekert wx-discuz wx.php validToken cross site scripting
A vulnerability was found in descreekert wx-discuz up to 12bd4745c63ec203cb32119bf77ead4a923bf277. It has been classified as problematic. This affects the function validToken of the file /wx.php. The manipulation of the argument echostr leads to cross site sc…
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Low 3.5
PHPGurukul Complaint Management System complaint-search.php cross site scripting
A vulnerability was found in PHPGurukul Complaint Management System 2.0 and classified as problematic. Affected by this issue is some unknown functionality of the file /admin/complaint-search.php. The manipulation of the argument Search leads to cross site sc…
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Low 3.5
cgpandey hotelmis HTTP GET Request admin.php cross site scripting
A vulnerability classified as problematic was found in cgpandey hotelmis up to c572198e6c4780fccc63b1d3e8f3f72f825fc94e. This vulnerability affects unknown code of the file admin.php of the component HTTP GET Request Handler. The manipulation of the argument …
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Low 3.5
PHPGurukul Online Security Guards Hiring System search.php cross site scripting
A vulnerability was found in PHPGurukul Online Security Guards Hiring System 1.0. It has been declared as problematic. This vulnerability affects unknown code of the file /admin/search.php. The manipulation of the argument searchdata leads to cross site scrip…
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Low 3.5
Gnuboard g6 Post Reply qa cross site scripting
A vulnerability, which was classified as problematic, has been found in Gnuboard g6 up to 6.0.10. This issue affects some unknown processing of the file /bbs/scrap_popin_update/qa/ of the component Post Reply Handler. The manipulation leads to cross site scri…
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Low 3.5
PHPGurukul Art Gallery Management System edit-art-medium-detail.php cross site scripting
A vulnerability, which was classified as problematic, has been found in PHPGurukul Art Gallery Management System 1.1. Affected by this issue is some unknown functionality of the file /admin/edit-art-medium-detail.php. The manipulation of the argument artmed l…
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Low 3.5
ZCMS Create Article Page cross site scripting
A vulnerability classified as problematic was found in ZCMS 3.6.0. This vulnerability affects unknown code of the component Create Article Page. The manipulation of the argument Title leads to cross site scripting. The attack can be initiated remotely. The ex…
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Low 3.5
Scada-LTS usersProfiles.shtm cross site scripting
A vulnerability classified as problematic was found in Scada-LTS up to 2.7.8.1. Affected by this vulnerability is an unknown functionality of the file usersProfiles.shtm. The manipulation of the argument Username leads to cross site scripting. The attack can …
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Low 3.5
Scada-LTS users.shtm cross site scripting
A vulnerability classified as problematic has been found in Scada-LTS up to 2.7.8.1. Affected is an unknown function of the file users.shtm. The manipulation of the argument Username leads to cross site scripting. It is possible to launch the attack remotely.…
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Low 3.5
PHPGurukul Online Library Management System student-history.php cross site scripting
A vulnerability has been found in PHPGurukul Online Library Management System 3.0 and classified as problematic. This vulnerability affects unknown code of the file /admin/student-history.php. The manipulation of the argument stdid leads to cross site scripti…
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Low 3.5
Bigotry OneBase think_exception.tpl parse_args cross site scripting
A vulnerability was found in Bigotry OneBase up to 1.3.6. It has been declared as problematic. Affected by this vulnerability is the function parse_args of the file /tpl/think_exception.tpl. The manipulation of the argument args leads to cross site scripting.…
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Low 2.4
Sapido RB-1802 URL Filtering Page urlfilter.asp cross site scripting
A vulnerability classified as problematic was found in Sapido RB-1802 1.0.32. This vulnerability affects unknown code of the file urlfilter.asp of the component URL Filtering Page. The manipulation of the argument URL address leads to cross site scripting. Th…
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Low 3.5
LiveHelperChat lhc-php-resque Extension List list cross site scripting
A vulnerability was found in LiveHelperChat lhc-php-resque Extension up to ee1270b35625f552425e32a6a3061cd54b5085c4. It has been classified as problematic. This affects an unknown part of the file /site_admin/lhcphpresque/list/ of the component List Handler. …
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Low 3.5
SourceCodester Zoo Management System animal_form_template.php cross site scripting
A vulnerability has been found in SourceCodester Zoo Management System 1.0 and classified as problematic. This vulnerability affects unknown code of the file /admin/templates/animal_form_template.php. The manipulation of the argument msg leads to cross site s…
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Low 3.5
CodeAstro Simple Hospital Management System POST Parameter doctor.html cross site scripting
A vulnerability classified as problematic was found in CodeAstro Simple Hospital Management System 1.0. Affected by this vulnerability is an unknown functionality of the file /doctor.html of the component POST Parameter Handler. The manipulation of the argume…
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Low 3.5
CodeAstro Simple Hospital Management System POST Parameter patient.html cross site scripting
A vulnerability was found in CodeAstro Simple Hospital Management System 1.0 and classified as problematic. Affected by this issue is some unknown functionality of the file /patient.html of the component POST Parameter Handler. The manipulation leads to cross…
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Low 2.4
SourceCodester Best Salon Management System Admin Profile Page admin-profile.php cross site scripting
A vulnerability has been found in SourceCodester Best Salon Management System 1.0 and classified as problematic. This vulnerability affects unknown code of the file /panel/admin-profile.php of the component Admin Profile Page. The manipulation of the argument…
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Low 2.4
SourceCodester Best Salon Management System Update Tax Page edit-tax.php cross site scripting
A vulnerability, which was classified as problematic, was found in SourceCodester Best Salon Management System 1.0. This affects an unknown part of the file /panel/edit-tax.php of the component Update Tax Page. The manipulation of the argument Tax Name leads …
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Low 2.4
SourceCodester Best Salon Management System search-appointment.php cross site scripting
A vulnerability, which was classified as problematic, has been found in SourceCodester Best Salon Management System 1.0. Affected by this issue is some unknown functionality of the file /panel/search-appointment.php. The manipulation leads to cross site scrip…
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Low 2.4
SourceCodester Best Salon Management System Update Staff Page edit_plan.php cross site scripting
A vulnerability classified as problematic was found in SourceCodester Best Salon Management System 1.0. Affected by this vulnerability is an unknown functionality of the file /panel/edit_plan.php of the component Update Staff Page. The manipulation leads to c…
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Low 2.4
SourceCodester Best Salon Management System Update Staff Page edit-staff.php cross site scripting
A vulnerability classified as problematic has been found in SourceCodester Best Salon Management System 1.0. Affected is an unknown function of the file /panel/edit-staff.php of the component Update Staff Page. The manipulation of the argument Staff Name lead…
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Low 2.4
SourceCodester Best Salon Management System Update Customer Details Page edit-customer-detailed.php cross site scripting
A vulnerability was found in SourceCodester Best Salon Management System 1.0. It has been rated as problematic. This issue affects some unknown processing of the file /panel/edit-customer-detailed.php of the component Update Customer Details Page. The manipul…
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Low 3.5
Portabilis i-Educar Curricular Components Module edit cross site scripting
A vulnerability was found in Portabilis i-Educar 2.9.0. It has been classified as problematic. Affected is an unknown function of the file /module/ComponenteCurricular/edit?id=ID of the component Curricular Components Module. The manipulation of the argument …
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Low 3.5
Portabilis i-Educar Function Management Module educar_funcao_det.php cross site scripting
A vulnerability was found in Portabilis i-Educar 2.9.0 and classified as problematic. This issue affects some unknown processing of the file /intranet/educar_funcao_det.php?cod_funcao=COD&ref_cod_instituicao=COD of the component Function Management Module. Th…
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Low 3.5
Portabilis i-Educar Course Module educar_curso_det.php cross site scripting
A vulnerability has been found in Portabilis i-Educar 2.9.0 and classified as problematic. This vulnerability affects unknown code of the file /intranet/educar_curso_det.php?cod_curso=ID of the component Course Module. The manipulation of the argument Curso l…
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Low 3.5
Portabilis i-Educar School Module educar_escola_lst.php cross site scripting
A vulnerability, which was classified as problematic, was found in Portabilis i-Educar 2.9.0. This affects an unknown part of the file /intranet/educar_escola_lst.php of the component School Module. The manipulation of the argument Escola leads to cross site …
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Low 3.5
Portabilis i-Educar Student Benefits Registration educar_aluno_beneficio_lst.php cross site scripting
A vulnerability, which was classified as problematic, has been found in Portabilis i-Educar 2.9.0. Affected by this issue is some unknown functionality of the file /intranet/educar_aluno_beneficio_lst.php of the component Student Benefits Registration. The ma…
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Low 3.5
Cockpit save cross site scripting
A vulnerability was found in Cockpit up to 2.11.3. It has been rated as problematic. This issue affects some unknown processing of the file /system/users/save. The manipulation of the argument name/email leads to cross site scripting. The attack may be initia…
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Low 3.5
code-projects Simple Forum forum_edit1.php cross site scripting
A vulnerability, which was classified as problematic, was found in code-projects Simple Forum 1.0. Affected is an unknown function of the file /forum_edit1.php. The manipulation of the argument text leads to cross site scripting. It is possible to launch the …
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Low 2.4
code-projects Food Distributor Site save_settings.php cross site scripting
A vulnerability, which was classified as problematic, was found in code-projects Food Distributor Site 1.0. Affected is an unknown function of the file /admin/save_settings.php. The manipulation of the argument site_phone/site_email/address leads to cross sit…
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Low 3.5
LabRedesCefetRJ WeGIA Cadastro de Funcionário cadastro_funcionario.php cross site scripting
A vulnerability classified as problematic has been found in LabRedesCefetRJ WeGIA 3.4.0. This affects an unknown part of the file /html/funcionario/cadastro_funcionario.php of the component Cadastro de Funcionário. The manipulation of the argument Nome/Sobren…
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Low 3.5
LabRedesCefetRJ WeGIA Adicionar tipo adicionar_tipoSaida.php cross site scripting
A vulnerability was found in LabRedesCefetRJ WeGIA 3.4.0. It has been rated as problematic. Affected by this issue is some unknown functionality of the file /html/matPat/adicionar_tipoSaida.php of the component Adicionar tipo. The manipulation of the argument…
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Low 3.5
LabRedesCefetRJ WeGIA Adicionar tipo adicionar_tipoEntrada.php cross site scripting
A vulnerability was found in LabRedesCefetRJ WeGIA 3.4.0. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /html/matPat/adicionar_tipoEntrada.php of the component Adicionar tipo. The manipulation of t…
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Low 3.5
LabRedesCefetRJ WeGIA Cadastro de Atendio Cadastro_Atendido.php cross site scripting
A vulnerability was found in LabRedesCefetRJ WeGIA 3.4.0. It has been classified as problematic. Affected is an unknown function of the file /html/atendido/Cadastro_Atendido.php of the component Cadastro de Atendio. The manipulation of the argument Nome/Sobre…