How severe is CVE-2021-26809?

CVE-2021-26809 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26809?

CVE-2021-26809 affects Phpgurukul Car Rental Portal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26809?

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

When was CVE-2021-26809 published?

CVE-2021-26809 was published on 2021-02-17 and last updated on 2026-06-17.

CVE-2021-26809

CVE-2021-26809 is a critical-severity vulnerability in Phpgurukul Car Rental Portal with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Phpgurukul Car Rental Portal
Published: 2021-02-17
Last modified: 2026-06-17

Description

PHPGurukul Car Rental Project version 2.0 suffers from a remote shell upload vulnerability in changeimage1.php.

Frequently asked questions

What is CVE-2021-26809?: PHPGurukul Car Rental Project version 2.0 suffers from a remote shell upload vulnerability in changeimage1.php.
How severe is CVE-2021-26809?: CVE-2021-26809 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26809?: CVE-2021-26809 affects Phpgurukul Car Rental Portal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-26809 published?: CVE-2021-26809 was published on 2021-02-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpgurukul:car_rental_portal:2.0:*:*:*:*:*:*:*

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