جزئیات آسیب‌پذیری

Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, the authenticated POST /messages/render endpoint renders the content parameter without enforcing the normal message length limit used by message send and edit operations. An authenticated user can submit Markdown up to the server body-size limit, causing disproportionate backend CPU consumption, and repeated or concurrent requests can degrade Markdown rendering performance or backend availability for other users. This issue is fixed in version 12.2.

• https://github.com/zulip/zulip/security/advisories/GHSA-m257-w4r5-5rmf x_refsource_CONFIRM
• https://github.com/zulip/zulip/pull/39913 x_refsource_MISC
• https://github.com/zulip/zulip/commit/31773c77c501391ede0fa8ec727f39508664e0ae x_refsource_MISC
• https://github.com/zulip/zulip/commit/4d94dd2ee6337a4b3351694dd314a45d3fe11031 x_refsource_MISC
• https://github.com/zulip/zulip/releases/tag/12.2 x_refsource_MISC
• https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2 x_refsource_MISC