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Fencer Intel
medium 6.1

CVE-2015-8935 json

The sapi_header_op function in main/SAPI.c in PHP before 5.4.38, 5.5.x before 5.5.22, and 5.6.x before 5.6.6 supports deprecated line foldi…

published 2016-08-07 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-8791

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

The sapi_header_op function in main/SAPI.c in PHP before 5.4.38, 5.5.x before 5.5.22, and 5.6.x before 5.6.6 supports deprecated line folding without considering browser compatibility, which allows remote attackers to conduct cross-site scripting (XSS) attacks against Internet Explorer by leveraging (1) %0A%20 or (2) %0D%0A%20 mishandling in the header function.

Patch / fix

  • php5 Ubuntu 14.04 LTS 5.5.9+dfsg-1ubuntu4.19

ubuntu advisories UBUNTU-CVE-2015-8935

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rh-php56 RHEL 2 SOFTWARE_COLLECTIONS 2.3-1.el6
  • rh-php56 RHEL 2 SOFTWARE_COLLECTIONS 2.3-1.el7
  • rh-php56-php RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el6
  • rh-php56-php RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el7
  • rh-php56-php-gd RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el6
  • rh-php56-php-gd RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el7
  • rh-php56-php-cli RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el6
  • rh-php56-php-cli RHEL 2 SOFTWARE_COLLECTIONS 5.6.25-1.el7

red hat advisories RHSA-2016:2750RHSA-2015:1066

  • php53 SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 5.3.17-74.1
  • php5 SLE Software Development Kit 12 SP1, SLE Module for Web and Scripting 12 5.5.14-68.1
  • php5 SLES 11 SP2-LTSS 5.2.14-0.7.30.89.1

suse advisories SUSE-SU-2016:2080-1SUSE-SU-2016:2013-1SUSE-SU-2016:1842-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-8935 updated cvss 3.1

php: HTTP response splitting in header() function

  • Red Hat Enterprise Linux 5 php, php53 Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more Red Hat Enterprise Linux 7 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +18 more Red Hat Software Collections php55-php, php55-php-gd, php55-php-cli, php55-php-dba, php55-php-fpm, php55-php-gmp, +20 more
    affected: no fix planned “Will not fix”
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) php54 2.0-1.el6, rh-php56 2.3-1.el6, php54-php 5.4.40-1.el6, php54-runtime 2.0-1.el6, php54-scldevel 2.0-1.el6, php54-php-gd 5.4.40-1.el6, +54 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) php54 2.0-1.el7, rh-php56 2.3-1.el7, php54-php 5.4.40-1.el7, php54-runtime 2.0-1.el7, php54-scldevel 2.0-1.el7, php54-php-gd 5.4.40-1.el7, +50 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) php54 2.0-1.el6, php54-php 5.4.40-1.el6, php54-runtime 2.0-1.el6, php54-scldevel 2.0-1.el6, php54-php-gd 5.4.40-1.el6, php54-php-cli 5.4.40-1.el6, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) php54 2.0-1.el6, php54-php 5.4.40-1.el6, php54-runtime 2.0-1.el6, php54-scldevel 2.0-1.el6, php54-php-gd 5.4.40-1.el6, php54-php-cli 5.4.40-1.el6, +22 more
    fixed: vendor fix RHSA-2015:1066
  • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-php56 2.3-1.el6, rh-php56-php 5.6.25-1.el6, rh-php56-runtime 2.3-1.el6, rh-php56-scldevel 2.3-1.el6, rh-php56-php-gd 5.6.25-1.el6, rh-php56-php-cli 5.6.25-1.el6, +26 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-php56 2.3-1.el7, rh-php56-php 5.6.25-1.el7, rh-php56-runtime 2.3-1.el7, rh-php56-scldevel 2.3-1.el7, rh-php56-php-gd 5.6.25-1.el7, rh-php56-php-cli 5.6.25-1.el7, +24 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) rh-php56 2.3-1.el7, rh-php56-php 5.6.25-1.el7, rh-php56-runtime 2.3-1.el7, rh-php56-scldevel 2.3-1.el7, rh-php56-php-gd 5.6.25-1.el7, rh-php56-php-cli 5.6.25-1.el7, +24 more
    fixed: vendor fix RHSA-2016:2750
  • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) php54 2.0-1.el6, rh-php56 2.3-1.el6, php54-php 5.4.40-1.el6, php54-runtime 2.0-1.el6, php54-scldevel 2.0-1.el6, php54-php-gd 5.4.40-1.el6, +54 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) php54 2.0-1.el7, rh-php56 2.3-1.el7, php54-php 5.4.40-1.el7, php54-runtime 2.0-1.el7, php54-scldevel 2.0-1.el7, php54-php-gd 5.4.40-1.el7, +50 more
    fixed: vendor fix RHSA-2015:1066

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.22% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.