How severe is CVE-2021-26703?

CVE-2021-26703 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26703?

CVE-2021-26703 affects Eprints. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-26703 published?

CVE-2021-26703 was published on 2021-03-01 and last updated on 2026-06-17.

CVE-2021-26703

CVE-2021-26703 is a critical-severity vulnerability in Eprints with a CVSS 3.x base score of 9.8. 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-611.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Eprints
Published: 2021-03-01
Last modified: 2026-06-17

Description

EPrints 3.4.2 allows remote attackers to read arbitrary files and possibly execute commands via crafted JSON/XML input to a cgi/ajax/phrase URI.

Frequently asked questions

What is CVE-2021-26703?: EPrints 3.4.2 allows remote attackers to read arbitrary files and possibly execute commands via crafted JSON/XML input to a cgi/ajax/phrase URI.
How severe is CVE-2021-26703?: CVE-2021-26703 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26703?: CVE-2021-26703 affects Eprints. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-26703 published?: CVE-2021-26703 was published on 2021-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eprints:eprints:3.4.2:*:*:*:*:*:*:*

More vulnerabilities in Eprints

CVE-2021-3342 — Critical (CVSS 9.8): EPrints 3.4.2 allows remote attackers to read arbitrary files and possibly execute commands via crafted LaTeX input to…
CVE-2021-26476 — Critical (CVSS 9.8): EPrints 3.4.2 allows remote attackers to execute OS commands via crafted LaTeX input to a cgi/cal?year= URI.
CVE-2021-26704 — High (CVSS 8.8): EPrints 3.4.2 allows remote attackers to execute arbitrary commands via crafted input to the verb parameter in a…
CVE-2021-26702 — Medium (CVSS 6.1): EPrints 3.4.2 exposes a reflected XSS opportunity in the dataset parameter to the cgi/dataset_dictionary URI.
CVE-2021-26475 — Medium (CVSS 6.1): EPrints 3.4.2 exposes a reflected XSS opportunity in the via a cgi/cal URI.

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