How severe is CVE-2021-29625?

CVE-2021-29625 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-29625 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29625?

CVE-2021-29625 affects Adminer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29625?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-29625 published?

CVE-2021-29625 was published on 2021-05-19 and last updated on 2026-06-17.

CVE-2021-29625

CVE-2021-29625 is a high-severity vulnerability in Adminer with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Adminer
Published: 2021-05-19
Last modified: 2026-06-17

Description

Adminer is open-source database management software. A cross-site scripting vulnerability in Adminer versions 4.6.1 to 4.8.0 affects users of MySQL, MariaDB, PgSQL and SQLite. XSS is in most cases prevented by strict CSP in all modern browsers. The only exception is when Adminer is using a `pdo_` extension to communicate with the database (it is used if the native extensions are not enabled). In browsers without CSP, Adminer versions 4.6.1 to 4.8.0 are affected. The vulnerability is patched in version 4.8.1. As workarounds, one can use a browser supporting strict CSP or enable the native PHP extensions (e.g. `mysqli`) or disable displaying PHP errors (`display_errors`).

Frequently asked questions

What is CVE-2021-29625?: Adminer is open-source database management software. A cross-site scripting vulnerability in Adminer versions 4.6.1 to 4.8.0 affects users of MySQL, MariaDB, PgSQL and SQLite. XSS is in most cases prevented by strict CSP in all modern browsers. The only exception is when Adminer is using a `pdo_` extension to communicate with the database (it is used if the native extensions are not enabled). In browsers without CSP, Adminer versions 4.6.1 to 4.8.0 are affected. The vulnerability is patched in version 4.8.1. As workarounds, one can use a browser supporting strict CSP or enable the native PHP extensions (e.g. `mysqli`) or disable displaying PHP errors (`display_errors`).
How severe is CVE-2021-29625?: CVE-2021-29625 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-29625 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29625?: CVE-2021-29625 affects Adminer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29625?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-29625 published?: CVE-2021-29625 was published on 2021-05-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*

More vulnerabilities in Adminer

CVE-2018-7667 — Critical (CVSS 9.8): Adminer through 4.3.1 has SSRF via the server parameter.
CVE-2025-43960 — High (CVSS 8.6): Adminer 4.8.1, when using Monolog for logging, allows a Denial of Service (memory consumption) via a crafted serialized…
CVE-2026-25892 — High (CVSS 7.5): Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where…
CVE-2021-43008 — High (CVSS 7.5): Improper Access Control in Adminer versions 1.12.0 to 4.6.2 (fixed in version 4.6.3) allows an attacker to achieve…
CVE-2021-21311 — High (CVSS 7.2): Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9…
CVE-2020-35572 — Medium (CVSS 6.1): Adminer through 4.7.8 allows XSS via the history parameter to the default URI.

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