Description
Vitess is a database clustering system for horizontal scaling of MySQL. Prior to 23.0.5 and 24.0.2, twopczHandler in go/vt/vttablet/tabletserver/twopcz.go writes the Action and dtid form values from the vttablet and vtcombo /twopcz HTTP debug endpoint into a text/html response without HTML escaping. Under the default allow-all ACL policy, a remote unauthenticated attacker can send an operator a crafted request that executes script in the operator's browser after the request is opened. The script runs with the vttablet debug origin and can read same-origin diagnostic endpoints that expose query, transaction, environment, variable, or profiling data available in that deployment. This issue is fixed in versions 23.0.5 and 24.0.2.
Affected products
linuxfoundation: vitess
References9
- github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-g… Vendor AdvisoryExploitMitigation
- github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139… Patch
- github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e… Patch
- github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac7… Patch
- github.com/vitessio/vitess/pull/20255 Issue TrackingPatch
- github.com/vitessio/vitess/pull/20273 Issue TrackingPatch
- github.com/vitessio/vitess/pull/20274 Issue TrackingPatch
- github.com/vitessio/vitess/releases/tag/v23.0.5 Release Notes
- github.com/vitessio/vitess/releases/tag/v24.0.2 Release Notes
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 68 · as of 11 November 2026
- CWE
- CWE-79
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