CVE-2021-25976 | Piranha CMS - Site-wide Cross-Site Request Forgery (CSRF)

In PiranhaCMS, versions 4.0.0-alpha1 to 9.2.0 are vulnerable to cross-site request forgery (CSRF) when performing various actions supported by the management system, such as deleting a user, deleting a role, editing a post, deleting a media folder etc., when an ID is known.

Published: 2021-11-16 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25976 is rated Low Risk (39.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-25976

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2023-03-07 0.89% 0.06% -0.83%
2 2022-04-01 2.56% 0.89% -1.68%
3 2022-02-04 — 2.56% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25976

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.2 [email protected]
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.2 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:H/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 4.9 [email protected]

Weakness enumeration for CVE-2021-25976

GitHub Security Advisory for CVE-2021-25976

GHSA-ppq7-88c7-q879 · Severity: high · Ecosystem: nuget — Cross-Site Request Forgery in PiranhaCMS

Affected software / configurations for CVE-2021-25976

Vendor Product Version Raw CPE
dotnetfoundation piranha_cms >= 4.0.1, <= 9.2 cpe:2.3:a:dotnetfoundation:piranha_cms:*:*:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:-:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha1:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha3:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha4:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha5:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha6:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha7:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha8:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha9:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:beta1:*:*:*:*:*:*
dotnetfoundation piranha_cms 4.0.0 cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:rc1:*:*:*:*:*:*

References for CVE-2021-25976

cvelogic Threat Intelligence