CVE-2018-7711

mediumpriority · track · 32EPSS 0.012 · 68 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.19% (68th) EPSS

CVSS 6.8 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.

cvss

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

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.1

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.08.1highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9

v3.08.1highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.07.4highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USprimaryCWE-347US

affected products (9)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
debian debian linux= 7.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
simplesamlphp saml21.0.0 → 1.10.6nvdUScpe:2.3:a:simplesamlphp:saml2:*:*:*:*:*:*:*:*
simplesamlphp saml22.0.0 → 2.3.8nvdUScpe:2.3:a:simplesamlphp:saml2:*:*:*:*:*:*:*:*
simplesamlphp saml23.0.0 → 3.1.4nvdUScpe:2.3:a:simplesamlphp:saml2:*:*:*:*:*:*:*:*
simplesamlphp simplesamlphp< 1.15.4nvdUScpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
Packagist simplesamlphp/saml2< 1.10.6osvUSpkg:composer/simplesamlphp/saml2
Packagist simplesamlphp/saml22.0 → 2.3.8osvUSpkg:composer/simplesamlphp/saml2
Packagist simplesamlphp/saml23.0 → 3.1.4osvUSpkg:composer/simplesamlphp/saml2

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-g888-g2pp-82hfSimpleSAMLphp saml2 incorrect signature validation2022-05-14ghsa · osvUS
HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-03-05modified 2026-06-17

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+1043 more

references (8)

External citations — patches, advisories, analysis.

scry

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