CVE-2022-31158
CVE-2022-31158 is a high-severity vulnerability in Packback Lti 1.3 Tool Library with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-294
- Affected product: Packback Lti 1.3 Tool Library
- Published:
- Last modified:
Description
LTI 1.3 Tool Library is a library used for building IMS-certified LTI 1.3 tool providers in PHP. Prior to version 5.0, the Nonce Claim Value was not being validated against the nonce value sent in the Authentication Request. Users should upgrade to version 5.0 to receive a patch. There are currently no known workarounds.
Frequently asked questions
- What is CVE-2022-31158?
- LTI 1.3 Tool Library is a library used for building IMS-certified LTI 1.3 tool providers in PHP. Prior to version 5.0, the Nonce Claim Value was not being validated against the nonce value sent in the Authentication Request. Users should upgrade to version 5.0 to receive a patch. There are currently no known workarounds.
- How severe is CVE-2022-31158?
- CVE-2022-31158 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2022-31158 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-31158?
- CVE-2022-31158 affects Packback Lti 1.3 Tool Library. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-31158?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2022-31158 published?
- CVE-2022-31158 was published on 2022-07-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:packback:lti_1.3_tool_library:*:*:*:*:*:*:*:*
More vulnerabilities in Packback Lti 1.3 Tool Library
- CVE-2022-31157 — High (CVSS 7.5): LTI 1.3 Tool Library is a library used for building IMS-certified LTI 1.3 tool providers in PHP. Prior to version 5.0,…
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