Adminer is an open-source database management in a single PHP file.
Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.
- Published
- Feb 11, 2021
- Updated
- Jun 16, 2026
- EPSS
- 98.5% · 100th percentile
- CWE
- CWE-918
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Report tools
Action score
88
Now
Patch today or shut off access.
- CVSS
- 28 / 40 · 7.2 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 30 / 30 · 98.5%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.2
- CNA · GitHub_M
- 7.2
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Sep 29, 2025. That signals real attacks, not theory.
Remediation deadline for government agencies: Oct 20, 2025.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| adminer | adminer | cpe:2.3:a:adminer:adminer |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- adminer adminer4.0.0 and later · before 4.7.9
- debian debian linux9.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
vrana adminer
- >= 4.0.0, < 4.7.9affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | adminer | before 4.7.9-1 | 4.7.9-1 |
| Debian:9 | adminer | before 4.2.5-3+deb9u2 | 4.2.5-3+deb9u2 |
| Packagist | vrana/adminer | before 4.7.9 | 4.7.9 |
Same product
adminer: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-7667Adminer through 4.3.1 has SSRF via the server parameter.40Plan
- CVE-2025-43960Adminer 4.8.1, when using Monolog for logging, allows a Denial of Service (memory consumption) via a crafted serialized payload (e.g., using34Monitor
- CVE-2021-43008Improper Access Control in Adminer versions 1.12.0 to 4.6.2 (fixed in version 4.6.3) allows an attacker to achieve Arbitrary File Read on th34Monitor
- CVE-2026-25892Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint31Monitor
- CVE-2026-15686Adminer multi_query Incorrect Check of Function Return Value Remote Code Execution Vulnerability28Monitor
- CVE-2021-29625Adminer is open-source database management software.27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| vrana adminer | 4.7.9 · description | Vendor (CNA) |
| Debian:adminer | 4.7.9-1 · Debian:12 | Package registry (OSV) |
| Packagist:vrana/adminer | 4.7.9 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×3
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Nuclei detection template | Nuclei template CVE-2021-21311 | — |
| Proof-of-concept repository on GitHub | stars:8 | 2022-02-14 |
| Proof-of-concept repository on GitHub | stars:3 | 2023-06-12 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-01-24 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+367 d
- CISA KEV+1690 d
- TodaySep 29, 2026+2056 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-918 · Server-Side Request Forgery (SSRF)CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
- github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
- lists.debian.org/debian-lts-announce/2021/03/msg00002.html
- packagist.org/packages/vrana/adminer
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311
Vendor advisories and official records. Exploit/PoC links are deliberately left out.