Vulnerability · Published Jun 1, 2026 · Assigned by CERT-PL
CVE-2026-40545Reflected XSS in SOPlanning
Medium 5.1
In plain English
A medium-severity cross-site scripting in SOPlanning from SOPlanning. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.4%top 65.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticated victim, results in arbitrary JavaScript execution in the victim’s browser. This issue affects SOPlanning version 1.55 and below.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SOPlanning | SOPlanning | 0 – through 1.55 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
References
- https://cert.pl/en/posts/2026/06/CVE-2026-40543 third-party-advisory
- https://www.soplanning.org/en/ product