Serv U
CVE-2021-35242
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
Serv-U server responds with valid CSRFToken when the request contains only Session.
AnalysisAI
Serv-U server responds with valid CSRFToken when the request contains only Session. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352), which allows attackers to trick authenticated users into performing unintended actions. Serv-U server responds with valid CSRFToken when the request contains only Session. Affected products include: Solarwinds Serv-U.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement anti-CSRF tokens, validate Origin/Referer headers, use SameSite cookie attribute.
Remote denial-of-service in SolarWinds Serv-U allows unauthenticated attackers to crash the Serv-U service by sending sp
Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Mem
SolarWinds Serv-U was susceptible to a directory transversal vulnerability that would allow access to read sensitive fil
In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (that include users' pas
A denial of service vulnerability in SolarWinds Serv-U before 15.1.6 HFv1 allows an authenticated user to crash the appl
Share/IncomingWizard.htm in SolarWinds Serv-U before 15.2.3 mishandles the user-supplied SenderEmail parameter, aka "Sha
Second type confusion vulnerability in SolarWinds Serv-U. Different attack vector from CVE-2025-40539 but same impact —
Type confusion vulnerability in SolarWinds Serv-U enables arbitrary code execution. Second critical Serv-U vulnerability
Broken access control in SolarWinds Serv-U allows unauthorized user creation by exploiting privilege assignment flaws. F
IDOR vulnerability in SolarWinds Serv-U allows accessing objects belonging to other users. Fourth critical Serv-U vulner
SolarWinds Serv-U is vulnerable to a directory traversal vulnerability where remote code execution is possible depending
The Serv-U File Server allows for events such as user login failures to be audited by executing a command. Rated high se
Same weakness CWE-352 – Cross-Site Request Forgery (CSRF)
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External POC / Exploit Code
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