Zulip 8.3 is vulnerable to Cross Site Scripting (XSS) via the replace_emoji_with_text function in ui_util.ts.
Conclusion & alert: CVE-2024-36625 is rated Low Risk (31.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.37%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.09% | 0.37% | +0.28% |
| 2 | 2025-11-21 | 0.20% | 0.09% | -0.11% |
| 3 | 2025-11-18 | — | 0.20% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.4 | 3.1 | MEDIUM |
|
2.3 | 2.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| URL | Tags |
|---|---|
| https://gist.github.com/1047524396/f7ada389ed2686481efef9e1f8307c51 | Patch Third Party Advisory |
| https://github.com/zulip/zulip/blob/8.3/web/src/ui_util.ts#L24 | Product |
| https://github.com/zulip/zulip/commit/191345f9d61f5b15762fe3ce19bf635bf885176a | Patch |