CVE-2020-7070
CVSS v3
5.3
MEDIUM
EPSS Score
5.0 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.
Technical details
- Published
- 2020-10-02
Frequently asked questions
What is CVE-2020-7070?
In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.
Is CVE-2020-7070 actively exploited?
Active exploitation of CVE-2020-7070 has not been confirmed. Its EPSS score was 5.0% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-7070?
CVE-2020-7070 has a CVSS v3 base score of 5.3 (MEDIUM severity).
Is CVE-2020-7070 affecting your environment?
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