🛡️ CVE-2026-33209 — avo

🟡 CVSS 6.1 — Medium ✅ No Known Exploit CWE-79 OSV
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Avo has a XSS vulnerability on return_to param

Description

A reflected cross-site scripting (XSS) vulnerability exists in the return_to query parameter used in the avo interface.

An attacker can craft a malicious URL that injects arbitrary JavaScript, which is executed when he clicks a dynamically generated navigation button.

Impact

This vulnerability may allow execution of arbitrary JavaScript in the context of the application.

Impact varies depending on deployment:

  • In unauthenticated setups: exploitable via crafted links sent to users
  • In authenticated setups: limited to authenticated users and requires interaction

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability none.

Weakness class

CVE-2026-33209 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2026-33209 is recorded against 1 package.

  • avo (fixed in 3.30.3)

Timeline and source

Published on 18 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)
github.com (Web)

Details

Severity MEDIUM
CVSS Score 6.1
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CWE CWE-79
Public Exploit ✅ No
Source OSV
Published 2026-03-18
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
avo 3.30.3

Similar Threats

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