Medium severity · published Dec 4, 2020
CVE-2020-27409
OpenSIS Community Edition before 7.5 is affected by a cross-site scripting (XSS) vulnerability in SideForStudent.php via the modname parameter
6.1
CVSS
1.2%
EPSS
No
On KEV
Description
OpenSIS Community Edition before 7.5 is affected by a cross-site scripting (XSS) vulnerability in SideForStudent.php via the modname parameter.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Opensis · Os4ed
before 7.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27409
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27409
Patch
https://github.com/OS4ED/openSIS-Responsive-Design/commit/edca0855e7bc27d5b28dcb2d16f057ada865e282#diff-5f88e2ce4cd96451df7580911120b4b2
Third Party Advisory
https://github.com/OS4ED/openSIS-Responsive-Design/compare/ver7.4...V7.5
Third Party Advisory
https://insinuator.net/2020/10/opensis-vulnerabilities/
More from Opensis
9.8
CVE-2021-41691
A SQL injection vulnerability exists in OS4Ed Open Source Information System Community v8.0 via the "student_id" and "TRANSFER{SCHOOL]" parameters in POST request sent to…
9.8
CVE-2025-22930
OS4ED openSIS v7.0 to v9.1 was discovered to contain a SQL injection vulnerability via the groupid parameter at /messaging/Group.php
9.8
CVE-2025-22928
OS4ED openSIS v7.0 to v9.1 was discovered to contain a SQL injection vulnerability via the cp_id parameter at /modules/messages/Inbox.php
9.8
CVE-2025-22926
An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to…
9.8
CVE-2025-22929
OS4ED openSIS v7.0 to v9.1 was discovered to contain a SQL injection vulnerability via the filter_id parameter at /students/StudentFilters.php