CVE-2021-25973
Publify - Improper Authorization Leads to Guest Signup Restriction Bypass
- Published
- Updated
- Reserved
- Assigned by
- Mend
Description
In Publify, 9.0.0.pre1 to 9.2.4 are vulnerable to Improper Access Control. “guest” role users can self-register even when the admin does not allow. This happens due to front-end restriction only.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
Timeline
ID reserved
By Mend
- 9 months later
· 9 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| MendCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.83% · top 42% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected 9.0.0.pre1 – < unspecified
- affected unspecified – ≤ 9.2.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- RubyGemspublify_coreGHSA-x24j-87x9-jvv5 (opens in a new tab)
What to do
Solution: Update to 9.2.5
References (2)
- https://github.com/publify/publify/commit/3447e0241e921b65f6eb1090453d8ea73e98387e (opens in a new tab)x_refsource_MISCx_transferred
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25973 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-x24j-87x9-jvv5 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-25973)Record last updated .