CVE-2023-33186
mediumpriority · track · 24EPSS 0.006 · 49 %ileEUUSEPSS · scored 2026-10-27
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. The main development branch of Zulip Server from May 2, 2023 and later, including beta versions 7.0-beta1 and 7.0-beta2, is vulnerable to a cross-site scripting vulnerability in tooltips on the message feed. An attacker who can send messages could maliciously craft a topic for the message, such that a victim who hovers the tooltip for that topic in their message feed triggers execution of JavaScript code controlled by the attacker.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.6–8.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (14)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2023-33186/cnnvd
- https://github.com/zulip/zulip/commit/03cfb3d9fe61c975d133121ec31a7357f0c9e18fcnnvd
- https://github.com/zulip/zulip/commit/3ca131743b00f42bad8edbac4ef92656d954c629cnnvd
- https://github.com/zulip/zulip/commit/903dbda79bd176702d3175a7c8a5450a64b6eccbcnnvd
- https://github.com/zulip/zulip/pull/25370cnnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-4r83-8f94-hrphcnnvd
- https://github.com/zulip/zulip/commit/03cfb3d9fe61c975d133121ec31a7357f0c9e18fenisa_euvd
- https://github.com/zulip/zulip/commit/3ca131743b00f42bad8edbac4ef92656d954c629enisa_euvd
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