Medium severity · published Jan 22, 2021
CVE-2021-22849
Hyweb HyCMS-J1 backend editing function does not filter special characters
5.4
CVSS
0.5%
EPSS
No
On KEV
Description
Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HY
Hycms-j1 · Hyweb
through 7.4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22849
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22849
Third Party Advisory
https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.html
More from Hycms-j1
8.8
CVE-2021-22847
Hyweb HyCMS-J1's API fail to filter POST request parameters