GetLateOrMissingIssues in C4/Serials.pm in Koha before 24.11.02 allows SQL Injection in /serials/lateissues-export.pl via the supplierid or serialid parameter.

Koha Library before 23.05.10 fails to sanitize user-controllable filenames prior to unzipping, leading to remote code execution. The line "qx/unzip $filename -d $dirname/;" in upload-cover-image.pl is vulnerable to command injection via shell metacharacters because input data can be controlled by an attacker and is directly included in a system command, i.e., an attack can occur via malicious filenames after uploading a .zip file and clicking Process Images.

The Send Basket functionality in Koha Library before 23.05.10 is susceptible to Time-Based SQL Injection because it fails to sanitize the POST parameter biblist in /cgi-bin/koha/opac-sendbasket.pl, allowing library users to read arbitrary data from the database.

SQL injection vulnerability in the MARC framework import/export function (admin/importexportframework.pl) in Koha before 3.8.23, 3.10.x before 3.10.13, 3.12.x before 3.12.10, and 3.14.x before 3.14.3 allows remote authenticated users to execute arbitrary SQL commands via unspecified vectors. NOTE: this can be leveraged by remote attackers using CVE-2014-1924.

The MARC framework import/export function (admin/importexportframework.pl) in Koha before 3.8.23, 3.10.x before 3.10.13, 3.12.x before 3.12.10, and 3.14.x before 3.14.3 does not require authentication, which allows remote attackers to conduct SQL injection attacks via unspecified vectors.

Multiple SQL injection vulnerabilities in Koha 3.14.x before 3.14.16, 3.16.x before 3.16.12, 3.18.x before 3.18.08, and 3.20.x before 3.20.1 allow (1) remote attackers to execute arbitrary SQL commands via the number parameter to opac-tagssubject.pl in the OPAC interface or (2) remote authenticated users to execute arbitrary SQL commands via the Filter or (3) Criteria parameter to reports/borrowersout.pl in the Staff interface.

An issue in Koha ILS 23.05 and before allows a remote attacker to execute arbitrary code via a crafted script to the format parameter.

Cross Site Scripting vulnerability in Koha ILS 23.05 and before allows a remote attacker to execute arbitrary code via the additonal-contents.pl component.

CSV Injection vulnerability in '/members/moremember.pl' and '/admin/aqbudgets.pl' endpoints in Koha Library Management System version 23.05.05 and earlier allows attackers to to inject DDE commands into csv exports via the 'Budget' and 'Patrons Member' components.

A Cross-Site Scripting (XSS) vulnerability exists in the OPAC search feature of Koha Library Management System v24.05. Unsanitized input entered in the search field is reflected in the search history interface, leading to the execution of arbitrary JavaScript in the browser context when the user interacts with the interface.

Koha's reports/issuesstats.pl (the circulation statistics report) builds its calculation query in sub calculate by concatenating several user-controlled request parameters directly into the SQL string. The PeriodTypeSel, PeriodDaySel, and PeriodMonthSel parameters are interpolated raw into single-quoted equality and function-comparison fragments, and the Filter slots plus the Line and Column identifiers are likewise interpolated with no whitelist and no placeholder binding.

Koha's guided report builder (reports/guidedreports.pl) reads the CGI parameter and, for each value, a dynamically-named parameter, and concatenates both directly into an SQL ORDER BY clause with no allowlist or validation. Since ORDER BY columns cannot be bound via prepared-statement placeholders, this requires an explicit allowlist, which does not exist.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Koha. Authentication is required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 8081 by default. The issue results from the lack of proper validation of a user-supplied string before passing it to the eval function. An attacker can leverage this vulnerability to execute code in the context of the service account.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Koha. Authentication is required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 8081 by default. The issue results from the lack of proper validation of a user-supplied string before passing it to the eval function. An attacker can leverage this vulnerability to execute code in the context of the service account.

Koha Eval Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Koha. Authentication is required to exploit this vulnerability.

The specific flaw exists within the web service, which listens on TCP port 8081 by default. The issue results from the lack of proper validation of a user-supplied string before passing it to the eval function. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-29165.

Koha is vulnerable to OS command injection in the Task Scheduler deletion path. The tools/scheduler.pl handler accepts the jobid request parameter for op=cud-delete and passes it to C4::Scheduler::removeatjob without validating it. Schedule::At::remove substitutes the supplied job ID into an atrm command string without quoting or escaping it and executes the command through a single-argument system() call, which invokes the shell. An authenticated staff user with the tools => scheduletasks permission can therefore execute arbitrary operating-system commands as the Koha web/application user by supplying shell metacharacters in jobid. The issue is fixed in Koha 24.11.20, 25.05.15, 25.11.09, and 26.05.04, and in the 26.11 development branch.

KOHA Library System version 16.11.x (up until 16.11.13) and 17.05.x (up until 17.05.05) contains a Cross Site Request Forgery (CSRF) vulnerability in /cgi-bin/koha/members/paycollect.pl Parameters affected: borrowernumber, amount, amountoutstanding, paid that can result in Attackers can mark payments as paid for certain users on behalf of Administrators. This attack appear to be exploitable via The victim must be socially engineered into clicking a link, usually via email. This vulnerability appears to have been fixed in 17.11.

Cross-site scripting (XSS) vulnerability in opac-addbybiblionumber.pl in Koha 3.14.x before 3.14.16, 3.16.x before 3.16.12, and 3.20.x before 3.20.1 allows remote attackers to inject arbitrary web script or HTML via a crafted list name.

An authenticated SQL Injection vulnerability (CWE-89) exists in the Koha staff interface in the /cgi-bin/koha/suggestion/suggestion.pl endpoint due to improper validation of the displayby parameter used by the GetDistinctValues functionality. Successful exploitation may lead to full compromise of the backend database, including disclosure or modification of stored data.

A multiple Cross-site scripting (XSS) vulnerability in the '/members/moremember.pl', and ‘/members/members-home.pl’ endpoints within Koha Library Management System version 23.05.05 and earlier allows malicious staff users to carry out CSRF attacks, including unauthorized changes to usernames and passwords of users visiting the affected page, via the 'Circulation note' and ‘Patrons Restriction’ components.

Multiple cross-site request forgery (CSRF) vulnerabilities in Koha 3.14.x before 3.14.16, 3.16.x before 3.16.12, 3.18.x before 3.18.08, and 3.20.x before 3.20.1 allow remote attackers to (1) hijack the authentication of administrators for requests that create a user via a request to members/memberentry.pl or (2) give a user superlibrarian permission via a request to members/member-flags.pl or (3) hijack the authentication of arbitrary users for requests that conduct cross-site scripting (XSS) attacks via the addshelf parameter to opac-shelves.pl.

Koha before 24.11.02 allows admins to execute arbitrary commands via shell metacharacters in the tools/scheduler.pl report parameter.

Koha is vulnerable to SQL injection in the Most-circulated items report. The reports/catissuestop.pl script (sub calculate) concatenates the user-controlled Criteria, Filter, and Limit request parameters directly into dynamic SQL. Criteria is only prefix-normalized and never validated against an allow-list, so it is inserted verbatim into identifier positions (SELECT DISTINCTROW, GROUP BY, ORDER BY, and the main calculation query). Filter values are concatenated raw into single-quoted LIKE, BETWEEN, and comparison fragments. Limit is appended raw to a LIMIT clause. An authenticated staff user with the reports module permission (not requiring superlibrarian) can inject arbitrary SQL and read any table reachable by the Koha database user, including borrowers (userid and bcrypt password hashes, two-factor secrets, personal data), apikeys, and sessions. The issue is fixed in Koha 24.11.19, 25.05.14, 25.11.08, and 26.05.03, and in the 26.11 development branch. This is the unpatched twin of reports/borissuestop.pl (CVE-2026-70372).

Multiple directory traversal vulnerabilities in the (1) staff interface help editor (edithelp.pl) or (2) member-picupload.pl in Koha before 3.8.23, 3.10.x before 3.10.13, 3.12.x before 3.12.10, and 3.14.x before 3.14.3 allow remote attackers to write to arbitrary files via unspecified vectors.

Absolute path traversal vulnerability in tools/pdfViewer.pl in Koha before 3.8.23, 3.10.x before 3.10.13, 3.12.x before 3.12.10, and 3.14.x before 3.14.3 allows remote attackers to read arbitrary files via unspecified vectors.

Multiple directory traversal vulnerabilities in Koha 3.14.x before 3.14.16, 3.16.x before 3.16.12, 3.18.x before 3.18.08, and 3.20.x before 3.20.1 allow remote attackers to read arbitrary files via a ..%2f (dot dot encoded slash) in the templatepath parameter to (1) svc/virtualshelves/search or (2) svc/members/search.

Koha versions up to 25.11 contain a Server-Side Request Forgery (SSRF) vulnerability via the Z39.50/SRU server configuration. This allows authenticated attackers to perform internal network scanning and identify running services by analyzing server response times.

A stored SQL injection vulnerability in Koha through 24.11.17, 25.05.12, 25.11.06, and 26.05.01 allows authenticated staff with the tools => labelcreator permission to execute arbitrary SQL via the imagename field of a patron card layout. The imagename value is stored verbatim in the layout XML and later concatenated raw into a SQL query in patroncards/create-pdf.pl when a patron card batch is printed. An attacker can read the entire Koha database including patron PII and staff bcrypt password hashes via error-based or time-based blind injection.

A stored cross-site scripting (XSS) vulnerability in the patron restriction type administration page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with administrator privileges to inject arbitrary web scripts via the restriction type label (displaytext field).

KOHA Library System version 16.11.x (up until 16.11.13) and 17.05.x (up until 17.05.05) contains a Cross Site Scripting (XSS) vulnerability in Multiple fields on multiple pages including /cgi-bin/koha/acqui/supplier.pl?op=enter , /cgi-bin/koha/circ/circulation.pl?borrowernumber=[number] , /cgi-bin/koha/serials/subscription-add.pl that can result in Privilege escalation by taking control of higher privileged users browser sessions. This attack appear to be exploitable via Victims must be socially engineered to visit a vulnerable webpage containing malicious payload. This vulnerability appears to have been fixed in 17.11.