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CVE-2026-77130

Insufficient Session Expiration in extension "SYSSY - TYPO3 Monitoring & Security Checks" (syssy)

MEDIUM
5.3
CVSS Score
Published: August 25, 2026 at 09:00 AM UTC
Updated: August 26, 2026 at 05:31 PM UTC
1 product affected across 1 vendorSyssy

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

The extension fails to properly validate the expiration of a client-supplied JWT token, allowing an attacker in control of a valid API key to authenticate with an expired token. Exploitation requires the attacker to already be in control of the SYSSY project's API key.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Syssy· TYPO3composer
60%
v < 3.0.6
Affected range stops below 3.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://typo3.org/security/advisory/typo3-ext-sa-2026-015

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMTYPO3
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-613

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