CVE-2018-20524

6.1 mediumEPSS 0.7%

Medium (6.1) in urlchatbox chat anywhere. EPSS 0.7% chance of exploitation in the next 30 days.

The Chat Anywhere extension 2.4.0 for Chrome allows XSS via crafted use of <<a> in a message, because a danmuWrapper DIV element in chatbox-only\danmu.js is outside the scope of a Content Security Policy (CSP).

Severity

CVSS 3.0

6.1 medium

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2018-12-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

urlchatbox:chat_anywhere

References

https://vul.su.ki/posts/Chat_Anywhere_2.4.0_XSS.md/
https://vul.su.ki/posts/Chat_Anywhere_2.4.0_XSS.md/

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