CVE-2020-7067 | OOB Read in urldecode()

Exp

In PHP versions 7.2.x below 7.2.30, 7.3.x below 7.3.17 and 7.4.x below 7.4.5, if PHP is compiled with EBCDIC support (uncommon), urldecode() function can be made to access locations past the allocated memory, due to erroneously using signed numbers as array indexes.

Published: 2020-04-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-7067 is rated High Exploit Risk (76.5/100): CVSS High severity, with high exploitation likelihood (EPSS 8.99%, 93th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-7067

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-7067

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 9.98% 8.99% -0.99%
2 2026-03-04 3.38% 9.98% +6.61%
3 2026-03-01 — 3.38% —

Full EPSS history (63 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-7067

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-7067

OS Trackers for CVE-2020-7067

vendor priority summary link
alpine high CVE-2020-7067: 1 source package rows (php7); 1 state rows across 1 repos (edge-community); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2020-7067
debian unimportant CVE-2020-7067 unimportant priority: Debian including 1 source packages (php7.4), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2020-7067
redhat medium — https://access.redhat.com/security/cve/CVE-2020-7067
suse medium CVE-2020-7067 severity moderate: SUSE including 225 source package names (apache2-mod_php5, apache2-mod_php53, …), 677 product×package rows across 34 product lines (SLES for SAP Applications 11 SP2, SLES for SAP Applications 11 SP3, … (34 product lines)): Known Not Affected 677. https://www.suse.com/security/cve/CVE-2020-7067/
ubuntu medium CVE-2020-7067 medium priority: Ubuntu including 5 source packages (php5, php7.0, php7.2, php7.3, php7.4), 25 status rows across 5 suites (bionic, eoan, trusty, upstream, xenial): DNE 16, not-affected 4, needs-triage 3, released 2. https://ubuntu.com/security/CVE-2020-7067

Affected software / configurations for CVE-2020-7067

Vendor Product Version Raw CPE
php php >= 7.2.0, < 7.2.30 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.3.0, < 7.3.17 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.4.0, < 7.4.5 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
tenable tenable.sc < 5.19.0 cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*
oracle communications_diameter_signaling_router >= 8.0.0.0, <= 8.4.0.5 cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2020-7067

cvelogic Threat Intelligence