HOMEVULNERABILITIESCVE-2023-50708
CRITICAL

CVE-2023-50708

CWE-203Published: December 22, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app->getSecurity()->compareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.

NVD Source

Technical Analysis

CVE-2023-50708 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

yiiframework1 product(s)
yii2-authclient
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248
PATCHhttps://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp
PATCHhttps://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248
PATCHhttps://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp

All References (10)

→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158Product
→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121Product
→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420Product
→
https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248Issue Tracking · Patch
→
https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xpExploit · Patch · Third Party Advisory
→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158Product
→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121Product
→
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420Product
→
https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248Issue Tracking · Patch
→
https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xpExploit · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2023-50708
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-203
CISA KEVNo
Affected1 vendor(s)
PublishedDec 22, 2023

Related CVEs (CWE-203)

CVE-2019-10071
9.8
CVE-2023-40756
9.8
CVE-2024-25714
9.8
CVE-2024-25191
9.8
CVE-2024-25189
9.8
CVE-2024-25190
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-50708 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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