CVE-2024-36625 — Zulip 8

Zulip 8.3 is vulnerable to Cross Site Scripting (XSS) via the replace_emoji_with_text function in ui_util.ts.

01What is this vulnerability?

Zulip 8.3 is vulnerable to Cross Site Scripting (XSS) via the replace_emoji_with_text function in ui_util.ts.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-11-29T00:00:00.000Z
• Last modified: 2024-11-29T17:09:49.937Z

09References

• github.com — https://github.com/zulip/zulip/commit/191345f9d61f5b15762fe3ce19bf635bf885176a
• github.com — https://github.com/zulip/zulip/blob/8.3/web/src/ui_util.ts#L24
• gist.github.com — https://gist.github.com/1047524396/f7ada389ed2686481efef9e1f8307c51