CVE-2012-2311

highpriority · attend · 64EPSS 0.693 · 99 %ileexploit · functionalEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

4 exploits · functional

Likely / severe?

69.3% (99th) EPSS

CVSS 7.5 · high

Is it mine?

213 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

EPSS · scored 2026-10-27

sapi/cgi/cgi_main.c in PHP before 5.3.13 and 5.4.x before 5.4.3, when configured as a CGI script (aka php-cgi), does not properly handle query strings that contain a %3D sequence but no = (equals sign) character, which allows remote attackers to execute arbitrary code by placing command-line options in the query string, related to lack of skipping a certain php_getopt for the 'd' case. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-1823.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.6–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

v3.15.6mediumAV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-89USprimaryCWE-89US

exploits (4)

Public proof-of-concept and weaponised exploit code.

EDB-18834PHP 5.3.12/5.4.2 - CGI Argument Injection (Metasploit)functional · exploit_db
EDB-18836PHP < 5.3.12 / < 5.4.2 - CGI Argument Injectionfunctional · exploit_db
EDB-29290Apache + PHP < 5.3.12 / < 5.4.2 - cgi-bin Remote Code Executionfunctional · exploit_db
EDB-29316Apache + PHP < 5.3.12 / < 5.4.2 - Remote Code Execution + ScannerPoC · exploit_db

affected products (213)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Canonical Ltd. Ubuntu≤ 12.04fstec_bduRU
Canonical Ltd. Ubuntu≤ 11.10fstec_bduRU
Canonical Ltd. Ubuntu≤ 8.04fstec_bduRU
Canonical Ltd. Ubuntu≤ 10.04fstec_bduRU
Canonical Ltd. Ubuntu≤ 11.04fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.0fstec_bduRU
PHP Group PHP≤ 2.0fstec_bduRU
PHP Group PHP≤ 1.0fstec_bduRU
PHP Group PHP≤ 5.2.17fstec_bduRU
PHP Group PHP≤ 3.0.12fstec_bduRU
PHP Group PHP≤ 3.0.7fstec_bduRU
PHP Group PHP≤ 4.0.6fstec_bduRU
PHP Group PHP≤ 5.1.3fstec_bduRU
PHP Group PHP≤ 4.3.9fstec_bduRU
PHP Group PHP≤ 3.0.1fstec_bduRU
PHP Group PHP≤ 5.2.8fstec_bduRU
PHP Group PHP≤ 5.0.5fstec_bduRU
PHP Group PHP≤ 5.0.0rc2fstec_bduRU
PHP Group PHP≤ 3.0.14fstec_bduRU

showing 20 of 213

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2012-05-11modified 2026-06-16

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+23868 more

references (51)

External citations — patches, advisories, analysis.

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