XSS in Twitter Twitter-server

CVE-2020-35774

server/handler/HistogramQueryHandler.scala in Twitter TwitterServer (aka twitter-server) before 20.12.0, in some configurations, allows XSS via the /histograms endpoint.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.876 (99.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-35774?
CVE-2020-35774 is a medium-severity vulnerability in Twitter Twitter-server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-29.
How severe is CVE-2020-35774?
Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-35774 known to be exploited?
4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.