CVE-2021-22849
MEDIUMCVSS 5.4/10EPSS 0.51%
Last modified
CVE-2021-22849 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hyweb | Hycms-J1 | <= 7.4.3 |
References
- https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.htmlThird Party Advisory
- https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-22849?
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.
How severe is CVE-2021-22849?
CVE-2021-22849 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22849?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-22849?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST