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CVE-2021-25976

25
FAUCET Score

CVE-2021-25976 describes a Cross-Site Request Forgery (CSRF) vulnerability affecting PiranhaCMS versions 4.0.0-alpha1 through 9.2.0. This flaw allows attackers to trick authenticated users into performing unintended actions, such as deleting users or roles, editing posts, or deleting media folders, provided the relevant ID is known. Rated 8.1 HIGH on the CVSS scale, it carries a high impact on integrity and availability with low attack complexity, requiring user interaction. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.1, <= 9.2CPE matchmatch criteria
cpe:2.3:a:dotnetfoundation:piranha_cms:*:*:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:-:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha1:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha3:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:dotnetfoundation:piranha_cms:4.0.0:alpha4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 39th percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
nugetpatch availablevia ghsa
Product: PiranhaFixed in: 10.0-alpha1

Vendor Advisories (1)

nugetGHSA-ppq7-88c7-q879high

Cross-Site Request Forgery in PiranhaCMS

Nov 17, 2021

References

github.com / PiranhaCMS/piranha.core/commit/e42abacdd0dd880ce9cf6607efcc24646ac82eda
PatchThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2021-25976
Third Party Advisory