CVE-2021-4259: A vulnerability was found in phpRedisAdmin up to 1.16.1

Q: How do I fix CVE-2021-4259?

phpredisadmin: upgrade to 1.16.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-4259 being exploited?

CVE-2021-4259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4259 affect?

CVE-2021-4259 affects phpredisadmin. Severity is medium (CVSS 5.0). A vulnerability was found in phpRedisAdmin up to 1.16.1. It has been classified as problematic. This affects the function authHttpDigest of the file includes/login.inc.php. The manipulation of the argument response leads to use of wrong ope

Q: How urgent is CVE-2021-4259?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2021-4259 is a medium-severity flaw (CVSS 5.0) affecting phpredisadmin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in phpRedisAdmin up to 1.16.1. It has been classified as problematic. This affects the function authHttpDigest of the file includes/login.inc.php. The manipulation of the argument response leads to use of wrong operator in string comparison. Upgrading to version 1.16.2 is able to address this issue. The name of the patch is 31aa7661e6db6f4dffbf9a635817832a0a11c7d9. It is recommended to upgrade the affected component. The

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-597
Published	2022-12-19
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: phpredisadmin project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-19 14:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

phpredisadmin project phpredisadmin UPGRADE

Affected: < 1.16.2

Fixed in: 1.16.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy phpredisadmin || rpm -q phpredisadmin || phpredisadmin --version

2. UPGRADE to 1.16.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade phpredisadmin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade phpredisadmin

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4259?

phpredisadmin: upgrade to 1.16.2. Exact commands for each OS are on this page.

Is CVE-2021-4259 being exploited?

CVE-2021-4259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4259 affect?

CVE-2021-4259 affects phpredisadmin. Severity is medium (CVSS 5.0). A vulnerability was found in phpRedisAdmin up to 1.16.1. It has been classified as problematic. This affects the function authHttpDigest of the file includes/login.inc.php. The manipulation of the argument response leads to use of wrong ope

How urgent is CVE-2021-4259?

Priority 32/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-4268 MEDIUM 4.3 UPGRADE A vulnerability, which was classified as problematic, was found in phpRedisAdmin up to 1.17.3
CVE-2020-27163 MEDIUM 6.1 UPGRADE phpRedisAdmin before 1.13.2 allows XSS via the login.php username parameter.

References

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