XSS in Fusionpbx
CVE-2020-21054
Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.7 allows remote malicious users to inject arbitrary web script or HTML via an unsanitized "f" variable in app\vars\vars_textarea.php.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Fusionpbx — versions 4.5.7
Weakness classification (CWE)
References
- resp3ctblog.wordpress.com/2019/10/28/fusionpbx-xss-21/ (Third Party Advisory)
- github.com/fusionpbx/fusionpbx/commit/2489004c7b7e0b14e21cd86cedaab87fed209415 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-21054?
- CVE-2020-21054 is a medium-severity vulnerability in Fusionpbx, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-20.
- How severe is CVE-2020-21054?
- Medium severity. CVSS v3 base score is 6.1 out of 10.