CVE-2026-40497
HighSummary
FreeScout to darmowy, samodzielnie hostowany system pomocy technicznej i wspólna skrzynka pocztowa. W wersjach przed 1.8.213 funkcja `Helper::stripDangerousTags()` usuwa tagi `<script>`, `<form>`, `<iframe>`, `<object>`, ale nie usuwa tagów `<style>`, co pozwala na wstrzykiwanie stylów CSS.
Risk Assessment
Atakujący z dostępem do ustawień skrzynki pocztowej (administrator lub agent z uprawnieniami) może wstrzykiwać selektory atrybutów CSS, co prowadzi do wykradzenia tokena CSRF dowolnego agenta/administratora przeglądającego rozmowę w tej skrzynce. Posiadając token CSRF, atakujący może przeprowadzać działania zmieniające stan jako ofiara, co prowadzi do eskalacji uprawnień.
Recommendation
Zaleca się aktualizację FreeScout do wersji 1.8.213 lub nowszej, aby usunąć tę podatność. Dodatkowo, należy ograniczyć dostęp do ustawień skrzynki pocztowej tylko do zaufanych użytkowników.
Related vulnerabilities
- CVE-2026-115252Critical
The Confection WordPress Cable plugin from 0.4.0 to 0.4.7 does not perform capability or nonce checks before saving its settings and writes one of them unmodified into a standalone PHP file that it then serves. This allows unauthenticated users to execute arbitrary PHP code on the server.
- CVE-2026-124585Critical
A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP devices within the web administration interface. The add_expmac function in var/html/webserver mishandles the mac argument, resulting in OS command injection. The attack can be performed remotely and a public exploit is available.
- CVE-2026-123870Critical
The otterdog webapp evaluates a format-string built from the incoming GitHub webhook JSON body using Python's eval(). When GITHUB_WEBHOOK_SECRET is unset or empty (default None), the HMAC signature check is skipped entirely, allowing an unauthenticated network client to reach the eval() sink with attacker-controlled input and execute arbitrary Python on the host.
- CVE-2026-124580Critical
A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP version 1.0 B-MB3W202-210825-r11775, affecting the handle_wechat_cn_wifi function in var/html/webserver within the Weixin Auth Endpoint component. Manipulation of the extend argument results in OS command injection. The attack can be executed remotely and the exploit has been made public.
- CVE-2026-124577Critical
A weakness has been identified in Intelbras SG 2404 PoE L2+ versions 1.00.70 and 1.00.72, affecting an unknown function in the /EXCU_SHELL file within the Web Management Interface component. Manipulation can lead to improper authentication. The attack can be launched remotely and the exploit has been made publicly available.
- CVE-2026-113364Critical
Buffer overflow in the data receiving process in NEC WebSAM WinShare versions 7.5.0 and earlier, 7.6.0, and 7.7.0 through 7.7.2 on Windows allows a remote unauthenticated attacker to execute arbitrary code with SYSTEM privileges via a crafted packet with a malformed data size value in the protocol header.
- CVE-2026-113363Critical
Improper input validation in the network communication processing in NEC WebSAM WinShare versions 7.2.0 through 7.5.0, 7.6.0, and 7.7.0 through 7.7.2 on Windows allows a remote unauthenticated attacker to execute arbitrary commands with SYSTEM privileges via a crafted network packet sent to the computer running WinShare.
- CVE-2026-124560Critical
A vulnerability was found in D-Link DIR-878 version 1.20B05 in the GetCAPTCHAsetting function of bin/prog.cgi (HNAP Handler component). Manipulating the uid argument results in a heap-based buffer overflow. The attack can be initiated remotely and the exploit has been made public.
- CVE-2026-119506Critical
The Frontend Admin by DynamiApps plugin (acf-frontend-form-element) through version 3.30.1 contains an incorrect privilege assignment vulnerability. The flaw allows an attacker to escalate privileges within the WordPress site.
- CVE-2026-6715Critical
IBM Concert 1.0 through 3.0.1.1 allows an attacker to supply crafted input that is incorporated into an operating system command without adequate validation or sanitization. Successful exploitation allows remote attackers to execute arbitrary commands on the underlying operating system with the privileges of the affected service.
Original NVD description (English source)
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's `Helper::stripDangerousTags()` removes `<script>`, `<form>`, `<iframe>`, `<object>` but does NOT strip `<style>` tags. The mailbox signature field is saved via POST /mailbox/settings/{id} and later rendered unescaped via `{!! $conversation->getSignatureProcessed([], true) !!}` in conversation views. CSP allows `style-src * 'self' 'unsafe-inline'`, so injected inline styles execute freely. An attacker with access to mailbox settings (admin or agent with mailbox permission) can inject CSS attribute selectors to exfiltrate the CSRF token of any agent/admin who views a conversation in that mailbox. With the CSRF token, the attacker can perform any state-changing action as the victim (create admin accounts, change email/password, etc.) — privilege escalation from agent to admin. This is the result of an incomplete fix of GHSA-jqjf-f566-485j. That advisory reported XSS via mailbox signature. T
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

